Mirror drawing

Drawing shouldn't be boring. Some small ticks can make it fun. One approach is to draw in mirror.

drawingPad.drawLine(startX, startY, mouseX, mouseY, 3);
drawingPad.drawLine(320-startX, startY, 320-mouseX, mouseY, 3);

What’s next? We’re going to take a look at “Challenge kaleidoscope”.