This function displays the sprite specified in id at the specified
position. If the sprite is already on the screen, it will be moved to
the new position. The optional argument can be used to specify which
frame shall be displayed. If it is omitted, DisplaySprite() will display
the next frame of the sprite (if the sprite has multiple frames).
Inputs
id
identifier of the sprite to display
x
desired x-position
y
desired y-position
frame
optional: frame to display (defaults to 0 which means show
the next frame of the sprite)