Colors library saturation function problem

Hello!

I`m using colors library for creating gradient background of screen, both colors of gradient are random. Also for using in fullscreen mode, my patch making little oval mouse pointer. Both of element changing dynamically it`s saturation from 1 to 0 and back, with different speed(kinda hypnotic,pulsing color effect).

Everything working fine, but i just realized(after adding mouse pointer element, where saturation change cycle much more faster) that whatever color was randomly chosen by program, after first cycle it turns into kind of pink... weird!

i`m using this line in setup

mcl=color(random(),random(),random())

mcl.saturation=mclsat
    
    if msd==0:
        mclsat-=0.1
        ms+=0.1
    else:
        mclsat+=0.1
        ms-=0.1
        
    if ms>=1:
        msd=1
    elif ms<=0.0:
        msd=0

here little example showing this problem(tell me if it is only me see it in red color...:)

size (400,400)
 
speed (30)
 
def setup():
    
   colors = ximport("colors")
   
   global col,sat,count
   
   col=color(random(),random(),random())
   sat=1
   count=0
    
def draw():
   global sat
   global count
   fill(col) 
   
   rect(WIDTH/2-50,HEIGHT/2-50,100,100,0.3)
   
   col.saturation=sat
   
   if count==0:
       sat-=0.03
   else:
       sat+=0.03
       
   if sat<=0.0:
       count=1
   elif sat>=1:
       count=0

First of, you're just importing the colors library but not using it.
So you should write

col=colors.Color(random(),random(),random())

i`ll try it! thanx!