Start with the starfield. I'll post some hints and a little code, then see how much you can put together.
First you need to know about arrays. You've just learned about variables, like X and Y for the position of your text, and how to move things around by adding to X and Y. What you need to do a starfield is a lot of X and Ys. One for each star. You could do X1,Y1 for star 1 and X2,Y2 for star 2, etc, but that would be an awful lot of variables.
What you can do instead is create an array, like this
Dim starx%(20)
Dim stary%(20)
That will give you 20 stars that you can work with. Each entry in the array is a separate variable. Instead of naming them all something different, you're numbering them, so you can access them easily.
You use a For loop to run through all the stars, like this
For star%=1 to 20
Print starx(star)
Next
That will print the x position of each of the stars.
You almost have enough information to do a starfield now.
To draw a graphics dot, use this command
WritePixel x,y,colour
So in your For loop, it'll look like this
For star%=1 to 20
WritePixel starx(star),stary(star),$ffffffff
Next
That will draw a white dot for each star.
You need to give the stars a random initial position, which you can do before your main loop, like this
For star%=1 to 20
starx(star)=Rand(640)
stary(star)=Rand(480)
Next
And then you can scroll all the stars to the left like this, inside your loop
For star%=1 to 20
starx(star)=starx(star)-1
Next
Each of the entries in the array acts just like a variable.
Finally, you can check for the stars going off the left hand edge and put them back on the right hand side
For star%=1 to 20
If starx(star)<0 Then
starx(star)=639
EndIf
Next
So you have something like this
Graphics 640,480,0,2
SetBuffer BackBuffer()
create the stars (dim, set random positions)
start loop
Cls
draw stars
move stars to left
check stars off left side and move them to right side
Flip
loop while key not pressed
End
See if you can put that together into a starfield.
Jim
