you can show your Code - it's easier for us then

you can use mouseClick and the display 200 Logos (for loop up to 200 and then image() with random() for x and y pos)

you can also have an automatic timer by use of millis() doing so everey minute.

Can you help me out with the millis part? here is a very basic primitive code. Simply a white background waiting for my logos to pop up. 

When you report an error, you better indicate which line is highlighted in the PDE, it helps in spotting the error. Here, the code is short, but when it is long, it is better (even more if we cannot run the code).

millis() returns an int, not a float.
Not sure what you try to do with the code above, but you don't use m.
I suggest to read the articles of the http://wiki.processing.org/w/Technical_FAQ (and the Learning section, of course), it shows how to use millis().

Oh, and try to find thread subjects more descriptive of your problem, technical problem of course.
And see also https://forum.processing.org/topic/where-to-place-threads-and-other-forum-practices