The blue rectangle example

Create main_screen, rect, blue:

.local pmc blue
.local pmc color_args
.local int color_type

color_args = new PerlHash
color_args[ 'r' ],   0
color_args[ 'g' ],   0
color_args[ 'b' ], 255

find_type color_type, 'SDL::Color'
new blue, color_type, color_args

Fill in the rectangle on the main screen and update it

main_screen.'fill_rect'(   rect, blue )
main_screen.'update_rect'( rect       )