diff --git a/emulator_shell.c b/emulator_shell.c
index 86757fb..f2a3ee8 100644
--- a/emulator_shell.c
+++ b/emulator_shell.c
@@ -1569,6 +1569,7 @@ typedef struct cpu_data {
     int total_cycles_count;
     GtkWidget* drawing_area;
     State8080 *state;
+    pthread_t pid;
 
 } cpu_data;
 
@@ -1616,10 +1617,14 @@ static void draw_callback(GtkWidget *widget, cairo_t *cr, gpointer user_data) {
                 int x = i; // swap x and y
                 int y = 255 - (j*8 + p); // flip the y-coordinate
                 if (x >= 0 && x < 256 && y >= 0 && y < 256) { // Check bounds
-                    if (pixel) {
-                        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); // Set color to white
+                    if (pixel && (y > 191) && (y < 240)) {
+                        cairo_set_source_rgb(cr, 0.1, 1.0, 0.1); // Set colour to green
+                    } else if (pixel && (y < 50) && (y > 32)) {
+                        cairo_set_source_rgb(cr, 1.0, 0.1, 0.1); // Set colour to red
+                    } else if (pixel) {
+                        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); // Set colour to white
                     } else {
-                        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0); // Set color to black
+                        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0); // Set colour to black
                     }
                     
                     cairo_rectangle(cr, x * upscaleFactor, y * upscaleFactor, upscaleFactor, upscaleFactor);
@@ -1684,6 +1689,14 @@ gboolean open_screen(gpointer data) {
     return FALSE;
 }
 
+void on_window_destroy(GtkWidget *widget, cpu_data *cpu_eco) {
+    pthread_cancel(cpu_eco->pid); // Assuming 'pid' is a member of 'cpu_data'
+    free(cpu_eco->state->memory);
+    free(cpu_eco->state);
+    free(cpu_eco);
+    gtk_main_quit();
+}
+
 
 
 int main (int argc, char *argv[])  {
@@ -1775,17 +1788,17 @@ int main (int argc, char *argv[])  {
     cpu_eco->total_cycles_count = 0;
     
     // Pthread
-    pthread_t pid;
-    pthread_create(&pid, NULL, cpu, (void*) cpu_eco);
+    pthread_create(&(cpu_eco->pid), NULL, cpu, (void*) cpu_eco);
+    g_signal_connect(window, "destroy", G_CALLBACK(on_window_destroy), cpu_eco);
     
 
     // Main GTK Loop
-    g_timeout_add(80, update_ui, drawing_area);
+    g_timeout_add(50, update_ui, drawing_area);
     gtk_main();
-    cpu_eco->done = 1;
-    pthread_join(pid, NULL);
-    free(state->memory);
-    free(state);
-    free(cpu_eco);
+    // cpu_eco->done = 1;
+    // pthread_join(pid, NULL);
+    // free(state->memory);
+    // free(state);
+    // free(cpu_eco);
     return 0;
 }
\ No newline at end of file
diff --git a/space.png~ b/space.png~
new file mode 100644
index 0000000..27e324f
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