Press on the colours and whatever square you press on, it will give you the same colour. Also there is another easier control. If you want red you can also press the 'r' key,if you want blue,press the 'b' key,if you want green ,press the 'g' key, if you want yellow, press the 'y' key and if you want black, press the 'l' key. If you make a mistake, you can press on the rubber or you can press the 'x' block which will clear everything. Also, you can change the width of the pencil.
