from processing import *

def setup():
    size(400,400)
    background(0)

def f(x,y,w,h,l):
    def q(p):
        return y+(p-a)/(b-a)*h
    a,b = 1.0* min(l) ,1.0* max(l)
    x0 ,y0 = x,q(l[0])
def draw():
    for i in range (1,len(l)):
        x1 = [x,x+w][i%2]
        y1 = q(l[i])
        line (x0 ,y0 ,x1 ,y1)
        x0 ,y0 = x1 ,y1
    for p in l:
        ellipse(x,q(p) ,10 ,10)
        ellipse(x+w,q(p) ,10 ,10)

f(50 ,50 ,400 ,400 ,[3 ,1 ,0 ,2 ,4 ,3 ,5])