Sprite.scale is the scale factor of the sprite. A scale of 1 means that one pixel in
the image appears as one pixel on screen. Setting
scale=2 makes the sprite appear twice as big; scale=0.5 makes it appear
half its standard size.
You may also scale a sprite differently in x and y by assigning a list of two numbers; the first is the x scale, and the second is the y scale, as in the example below.
sp = new Sprite sp.image = file.loadImage("/sys/pics/Wumpus.png") display(4).sprites.push sp sp.scale = [2,1] // double the width, but leave height alone