Why are executables so big?

Hey,

For fun, I compiled a simple program, which displayed a window with a colored background in it. This "program" takes up 684kb of space!!

Is there a logic explanation for this?

Yes. Read the site FAQ - Why are Blitz3D/Plus programs so large?

Ah.. Thank you. ;)

You can use UPX to compress the executable. I've found that most of my 3D code compresses to about 450kb and it doesn't seem to have an effect on the speed of the code.