The bitmap commands make resizing any image easier without having the main screen be a specific size and it doesn't involve sprites. In the following code snip just change the CREATE BITMAP command to use the size you want instead of SCREEN WIDTH() and SCREEN HEIGHT().
` Make a box
box 0,0,200,200,rgb(255,0,0),rgb(0,255,0),rgb(0,0,255),rgb(255,255,255)
` Grab image
get image 1,0,0,200,200,1
` Save the image
save image "Back1.png",1
` Load the pic as a bitmap
load bitmap "Back1.png",1
` Make a bitmap the size of the screen
create bitmap 2,screen width(),screen height()
` Copy the first bitmap into the second (to resize bitmap 1 to the size of bitmap 2)
copy bitmap 1,0,0,bitmap width(1),bitmap height(1),2,0,0,bitmap width(2),bitmap height(2)
` Grab the image
get image 1,0,0,bitmap width(2),bitmap height(2),1
` Delete bitmaps (no longer needed)
delete bitmap 1
delete bitmap 2
` Show the resized image
paste image 1,0,0
wait key
And there's an even easier way with Sven B's Image Kit (using the saved Back1.png above... again change SCREEN WIDTH() and SCREEN HEIGHT() to your desired size):
` Load the image
load image "Back1.png",1,1
` Resize the image
ik resize image 1,screen width(),screen height(),0
` Show the resized image
paste image 1,0,0
wait key
