Thanks vegaseat, I will keeping learning,
http://www.cs.iupui.edu/~aharris/pygame/
this is the source I learn from, good lessons for pygame with videos and powerpoints, maybe we can put the link...

I kind of got what I wanted. But it's still one circle floating up at a time. Please give advice on how to make multiple circles. Thanks

import pygame, random
pygame.init()
X = 680
Y = 460
...

Python beginner try to learn pygame. Here is a program I made for random color circles popping out.

import pygame, random
pygame.init()
X = 680
Y = 460
def main():
screen =...

Thanks a lot vegaseat, your revised code is very helpful!

import pygame

pygame.init()




def main():

screen = pygame.display.set_mode((640, 480))

sadwickman got the easiest solution, the problem of your program is that you don't need to set coin_flips = 0 in the beggining, what you wanted to do is to initialize timesFlipped to 0.
so your...

Thanks Gribouillis. I am also trying the join method, just for me to learn. It's good

Thank you so much sneekula, this is exactly what I want this to be. I was wondering how I should build a string, because string is immutable. Now im clear. Thank you

Thank you very much Gribouillis, but is there any way to do this without the join method? We haven't covered that in class yet.

I tried really hard on this one, finally came up with this, however, there's space between every number in my result because of the code 'print xxx,' , I want to find a way to delete those spaces....