from visual import *
from random import *
from time import *
display(background=(1, 1, 1))
our_list = [sphere(radius=random()/2, color=(random(), random(), random())) for i in range(20)]

def arrange_list():
    for i, s in enumerate(our_list):
        s.pos = (i-len(our_list)/2, 0, 0)

def swap(a, b):
    temp = our_list[a]
    our_list[a] = our_list[b]
    our_list[b] = temp


arrange_list()

# Do your reverse here!