The animation loop

The animation loop is shown in Listing 2.

Listing 2 contains a pair of nested while loops.

The outer loop continues to iterate until the user presses the Esc key, at which time the program terminates.

Listing 2. The animation loop. 
  while(!key[KEY_ESC]){
    while(mouseInfo(&xCoor,&yCoor,&color)){
      //Draw while mouse button is down.
      draw(xCoor,yCoor,screenBuf,color);
    }//end while
  }//end while

  return 0;
}//end main
END_OF_MAIN();