diff --git a/source/game/event.c b/source/game/event.c
index c7cbd4a..41cec24 100644
--- a/source/game/event.c
+++ b/source/game/event.c
@@ -37,7 +37,7 @@ void Subscribe(struct Delegate *d, void (*event)(void *args))
     d->len += 1;
 }
 
-void Call(struct Delegate *d, void *args)
+void Invoke(struct Delegate *d, void *args)
 {
     for (size_t i = 0; i < d->len; i++) {
         d->events[i](args);
diff --git a/source/game/event.h b/source/game/event.h
index ce7a4cd..03e47bc 100644
--- a/source/game/event.h
+++ b/source/game/event.h
@@ -17,4 +17,4 @@ struct Delegate NewDelegate(size_t capacity);
 
 void Subscribe(struct Delegate *d, void (*event)(void *args));
 
-void Call(struct Delegate *d, void *args);
\ No newline at end of file
+void Invoke(struct Delegate *d, void *args);
\ No newline at end of file
diff --git a/source/game/tetr.c b/source/game/tetr.c
index c579f0d..fade61d 100644
--- a/source/game/tetr.c
+++ b/source/game/tetr.c
@@ -42,8 +42,8 @@ void TetrMapToTermBuf(struct TetrMap *map, struct Terminal *term)
         size_t map_i = y * map->wid + x;
         size_t buf_i = (y + map->y) * term->wid + (x + map->x) * 2;
 
-        struct TChar4 *a = &term->blks[buf_i];
-        struct TChar4 *b = &term->blks[buf_i + 1];
+        struct TChar4 *a = &term->bufs[buf_i];
+        struct TChar4 *b = &term->bufs[buf_i + 1];
 
         if (map->blks[map_i] == 0) {
             a->ch = '(';
diff --git a/source/io/ctrl.c b/source/io/ctrl.c
index c049964..d55d7fd 100644
--- a/source/io/ctrl.c
+++ b/source/io/ctrl.c
@@ -146,8 +146,6 @@ void CtrlSet(
     ctrl->binds.capacity = b_len;
     ctrl->binds.bkts = bind_bkts;
     memset(bind_bkts, 0, sizeof(struct ctrl_bkt) * b_len);
-    
-    
 }
 
 struct ctrl_bkt *get_bkt(struct ctrl_dict *dict, size_t i)
diff --git a/source/main.c b/source/main.c
index 3d62caf..cd35607 100644
--- a/source/main.c
+++ b/source/main.c
@@ -90,19 +90,60 @@ const struct CtrlBind ctrl_binds[12] = {
     { MOUSE, 0, JOYSTICK }
 };
 
-void Draw(struct Instance *game)
+bool DrawUpdate(struct Terminal *term, struct Instance *game, char *buf)
 {
-    while (true) {
-        Call(&game->on_draw, game);
+    bool is_update;
+
+    TermLock(term);
+    {
+        is_update = TermWaitUpdate(term);
+        if(is_update) {
+            Invoke(&game->on_draw, game);
+            TermOut(term, buf);
+        }
     }
+    TermUnlock(term);
+
+    return is_update;
+}
+
+void Draw(struct Terminal *term, struct Instance *game)
+{
+    struct TChar4 buf0[term->area];
+    struct TChar4 buf1[term->area];
+    
+    TermLock(term);
+    {
+        TermSetBufs(term, buf0, buf1);
+    }
+    TermUnlock(term);
+    TermSignalSafe(term);
+
+    char buf[term->buf_size];
+    
+    while (true) {
+        if (!DrawUpdate(term, game, buf))
+            break;
+        
+        puts(buf);
+    }
+
+    
 }
 
 void Update(struct Instance *game)
 {
-
+    WaitSafeTerm(&game->term);
 
     while (true) {
-        Call(&game->on_update, game);
+        // Input
+        CtrlPoll(&game->ctrl, &game->rec_buf);
+
+        // Game logic
+        Invoke(&game->on_update, game);
+
+        // Draw
+        UpdateTerm(&game->term);
     }
 }
 
diff --git a/source/term/term.c b/source/term/term.c
index 821d545..0150bf1 100644
--- a/source/term/term.c
+++ b/source/term/term.c
@@ -18,41 +18,138 @@ struct TChar4 {
 struct Terminal {
     size_t wid;
     size_t hgt;
-    size_t area;
     u16f refresh_rate;
-    struct TChar4 *blks;
+
+    size_t area;
+    size_t buf_size;
+
+    struct TChar4 *bufs[2];
+    u8f switch_read;
+    u8f switch_write;
 
     pthread_mutex_t mutex;
-    pthread_cond_t is_initialized;
-    pthread_cond_t draw_ready;
+    pthread_cond_t update;
+
+    struct {
+        u8f is_writing : 1;
+        u8f resize : 1;
+    } flags;
 };
 
-struct Terminal NewTerm(size_t wid, size_t hgt)
-{
-    return (struct Terminal) {
-        .wid = wid,
-        .hgt = hgt,
-        .area = wid * hgt,
-        .refresh_rate = 60,
-        .blks = nullptr,
-        
-        .mutex = PTHREAD_MUTEX_INITIALIZER,
-        .is_initialized = PTHREAD_COND_INITIALIZER,
-        .draw_ready = PTHREAD_COND_INITIALIZER
-    };
-}
-
-size_t TermBufSize(struct Terminal *term)
+size_t buf_size(size_t area,  size_t hgt)
 {
     static const size_t max_color_str_len = 10;
     static const size_t reset_str_len = 7;
 
     return reset_str_len
-        + (max_color_str_len + 1) * term->area
-        + (term->hgt - 1)
+        + (max_color_str_len + 1) * area
+        + (hgt - 1)
         + 1;
 }
 
+struct Terminal NewTerm(size_t wid, size_t hgt)
+{
+    size_t area = wid * hgt;
+
+    return (struct Terminal) {
+        .wid = wid,
+        .hgt = hgt,
+        .refresh_rate = 60,
+
+        .area = area,
+        .buf_size = 0,
+
+        .bufs = nullptr,
+        .switch_read = 0,
+        .switch_write = 0,
+        
+        .mutex = PTHREAD_MUTEX_INITIALIZER,
+        .update = PTHREAD_COND_INITIALIZER,
+        
+        .flags.is_writing = true,
+        .flags.resize = false
+    };
+}
+
+void TermSetBufs(struct Terminal *term, struct TChar4 *buf0, struct TChar4 *buf1)
+{
+    term->buf_size = buf_size(term->area, term->hgt);
+    term->bufs[0] = buf0;
+    term->bufs[1] = buf1;
+}
+
+void TermResize(struct Terminal *term, size_t wid, size_t hgt)
+{
+    size_t area = wid * hgt;
+    size_t buf_size = term_buf_size(area, hgt);
+    
+    pthread_mutex_lock(&term->mutex);
+    {
+        term->wid = wid;
+        term->hgt = hgt;
+
+        term->area = area;
+        term->buf_size = buf_size;
+
+        term->flags.resize = true;
+        
+        pthread_cond_signal(&term->update);
+    }
+    pthread_mutex_unlock(&term->mutex);
+}
+
+void UpdateTerm(struct Terminal *term)
+{
+    pthread_mutex_lock(&term->mutex);
+    {
+        term->switch_read = term->switch_write;
+        term->switch_write = (term->switch_write + 1) % 2;
+
+        term->flags.is_writing = false;
+
+        pthread_cond_signal(&term->update);
+    }
+    pthread_mutex_unlock(&term->mutex);
+}
+
+bool TermWaitUpdate(struct Terminal *term)
+{
+    while (term->flags.is_writing) {
+        pthread_cond_wait(&term->update, &term->mutex);
+
+        if (term->flags.resize) {
+            term->flags.resize = false;
+            return false;
+        }
+    }
+    return true;
+}
+
+void TermSignalSafe(struct Terminal *term)
+{
+    pthread_cond_signal(&term->update);
+}
+
+void WaitSafeTerm(struct Terminal *term)
+{
+    pthread_mutex_lock(&term->mutex);
+    while (term->bufs == nullptr) {
+        pthread_cond_wait(&term->update, &term->mutex);
+    }
+    
+    pthread_mutex_unlock(&term->mutex);
+}
+
+void TermLock(struct Terminal *term)
+{
+    pthread_mutex_lock(&term->mutex);
+}
+
+void TermUnlock(struct Terminal *term)
+{
+    pthread_mutex_unlock(&term->mutex);
+}
+
 size_t printcol4(char *buf, size_t at, size_t max, u8f col, char ch)
 {
     if (col < 8)
@@ -80,17 +177,17 @@ size_t printblk4(char *buf, size_t at, size_t max, struct TChar4 *blk)
     return snprintf(buf + at, max - at, "\x1b[%u;%um%c", bg, fg, blk->ch);
 }
 
-size_t TermOut(struct Terminal *term, char *buf, size_t n)
+size_t TermOut(struct Terminal *term, char *buf)
 {
     u8f last_bg = 0;
     u8f last_fg = 0;
 
-    size_t filled = snprintf(buf, n, "\x1b[H\x1b[0m");
+    size_t filled = snprintf(buf, term->buf_size, "\x1b[H\x1b[0m");
 
     for(size_t y = 0; y < term->hgt; y++) {
     for(size_t x = 0; x < term->wid; x++) {
         size_t i = y * term->wid + x;
-        struct TChar4 *blk = &term->blks[i];
+        struct TChar4 *blk = &term->bufs[i];
         
         // DEBUG
         if (blk->ch == 0)
@@ -100,13 +197,13 @@ size_t TermOut(struct Terminal *term, char *buf, size_t n)
         if (blk->bg != 0 and blk->bg != last_bg) {
             last_bg = blk->bg;
             if (blk->fg != 0 and blk->fg != last_fg) {
-                filled += printblk4(buf, filled, n, blk);
+                filled += printblk4(buf, filled, term->buf_size, blk);
                 last_fg = blk->fg;
             } else {
-                filled += printcol4(buf, filled, n, blk->bg, blk->ch);
+                filled += printcol4(buf, filled, term->buf_size, blk->bg, blk->ch);
             }
         } else if (blk->fg != 0 and blk->fg != last_fg) {
-            filled += printcol4(buf, filled, n, blk->fg, blk->ch);
+            filled += printcol4(buf, filled, term->buf_size, blk->fg, blk->ch);
             last_fg = blk->fg;
         } else {
             buf[filled] = blk->ch;
diff --git a/source/term/term.h b/source/term/term.h
index d3f9b0e..37cf81e 100644
--- a/source/term/term.h
+++ b/source/term/term.h
@@ -21,15 +21,34 @@ struct Terminal {
     size_t hgt;
     size_t area;
     u16f refresh_rate;
-    struct TChar4 *blks;
+
+    struct TChar4 *bufs[2];
+    size_t buf_size;
+    u8f switch_read;
+    u8f switch_write;
 
     pthread_mutex_t mutex;
-    pthread_cond_t is_initialized;
-    pthread_cond_t draw_ready;
+    pthread_cond_t update;
+
+    struct {
+        u8f is_writing : 1;
+        u8f resize : 1;
+    } flags;
 };
 
 struct Terminal NewTerm(size_t wid, size_t hgt);
 
-size_t TermBufSize(struct Terminal *term);
+void TermSetBufs(struct Terminal *term, struct TChar4 *buf0, struct TChar4 *buf1);
 
-size_t TermOut(struct Terminal *term, char *buf, size_t max_chars);
\ No newline at end of file
+void TermResize(struct Terminal *term, size_t wid, size_t hgt);
+
+void UpdateTerm(struct Terminal *term);
+bool TermWaitUpdate(struct Terminal *term);
+
+void TermSignalSafe(struct Terminal *term);
+void WaitSafeTerm(struct Terminal *term);
+
+void TermLock(struct Terminal *term);
+void TermUnlock(struct Terminal *term);
+
+size_t TermOut(struct Terminal *term, char *buf);
\ No newline at end of file