clear()
19.6/10 //> val res143: Double = 1.9600000000000002
setBackground(blue)
setPenColor(magenta)
setPenThickness(10)
forward(20)
setPenThickness(14)
forward(20)
setPenThickness(19.6)
forward(20)
setPenThickness(27.4)
forward(20)
setPenThickness(38.4)
forward(20)
setPenThickness(57.7)
forward(20)
1.96/2 //> val res158: Double = 0.98
1.4*1.4 //> val res159: Double = 1.9599999999999997