Functions in the Paint Utilities API:
paintutils.drawPixel( x, y, colour )
paintutils.drawLine( startX, startY, endX, endY, colour )
paintutils.drawBox( startX, startY, endX, endY, colour )
paintutils.drawFilledBox( startX, startY, endX, endY, colour )
paintutils.loadImage( path )
paintutils.drawImage( image, x, y )