To change drawing modes, please press one of the key inputs:

• "p" for points
• "l" for lines
• "t" for triangles
• "s" for squares
• "d" for disks

If drawing squares, press keys 1-6 to change the drawing method:

• "1" for gl.TRIANGLES
• "2" for gl.TRIANGLE_STRIP
• "3" for gl.TRIANGLE_FAN
• "4" for gl.LINES
• "5" for gl.LINE_STRIP
• "6" for gl.LINE_LOOP

To reset the canvas, please press "r".