clear()
setBackground(blue)
setPenColor(magenta)
setPenThickness(5)
forward(5)
setPenThickness(10)
forward(7)
setPenThickness(5)
forward(9)
setPenThickness(15)
forward(11)
setPenThickness(20)
forward(13)
setPenThickness(25)
forward(15)
setPenThickness(30)
forward(17)
setPenThickness(35)
forward(19)
setPenThickness(40)
forward(21)
setPenThickness(45)
forward(23)
setPenThickness(55)
forward(25)