Computer Animation Arts

1st year Jake here, Towards the end of my first final piece, I noticed that it became increasing long to save. I checked the file and the size grew from, when I last saw it, 78 mb to 104 mb. That kind of growth is bizarre, considering I was just going over the top with an air brush. Now that one didn't bother me so much, however my recent piece has grown to such an extent it's ridiculous. The file size grew from 72 mb to 143 mb to 330 mb to a whopping 440 mb! I can't understand why it's growing so rapidly. I've cut around the image to make sure there's nothing off canvas. If anyone can help, I'd greatly appreciate it.

I've built a fan using motion paths, but need to animate it using expressions to be able to control the speed and various other things. The fan animated with keyframes: I'm trying to create an expression which makes each fan blade traverse the motion path like it does above, but the expression is only executed once. My expression at the moment: Is there a way to have the expression execute itself again once the blade has made one revolution of the path? Once the uValue hits 1, it stays at 1. I think I need it to reset to 0 once it reaches 1 so that the blade appears to rotate indefinitely. I took a shot in the dark and wrote this: motionPath1.uValue = time * 0.1; if (motionPath1.uValue ==1) motionPath1.uValue =0; But it didn't work. EDIT: Resolved using this code: motionPath1.uValue = (frame % 60) / 60; Where "60" is the number of frames the object takes to revolve fully around the motion path, or, if the motion path isn't closed, for the object to go from sta...