clear()
setBackground(blue)
forward(10)
setPenThickness(10)
setPenColor(magenta)
forward(20)
setPenThickness(20)
forward(20)
setPenThickness(30)
forward(20)
setPenThickness(40)
forward(20)
setPenThickness(50)
forward(20)
setPenThickness(60)
forward(20)