clear()
setBackground(purple)
setPenColor(magenta)
setPenThickness(10)
forward(20)
setPenThickness(14)
forward(20)
setPenThickness(19.6)
forward(20)
setPenThickness(27.44)
forward(20)
setPenThickness(38.416)
forward(20)
setPenThickness(53.7824)
forward(20)