import random
       
        
clear_convex_hull_plot("test")
for step in range(1,5):
    x,y=[],[]
    for i in range(20):
        x.append(random.random() * 100 / step)
        y.append(random.random() * 100/ step)       
    add_convex_hull_plot ("test", x,y,"Step " + str(step))