random terrain generation

I'm trying to generate a terrain on a 40 x 40 grid. There should be three mountains, which i'll color yellow, and then gradually change to white as the altitude decreases. Can someone please try and explain to me how I can do this. I read a whole lot of source code, but it's mostly Java or C++, and it is to do 3D terrains without grids.

ACtually terrain generating is a set of algoritms you should make yourself. To make a terrain just declare a byte or integer array.

Here's an example for the altitude:

Code:

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For y=0 to 40
 For x=0 to 40
  terrain(x,y)=int(rnd*5+abs(20-y)/2)
 next x
next y

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