Need help to finish easiest ripping project

[ZeldaClassicEXPERT]

Because you can load a background and then
screen_save(filename,x,y,width,height)
like this

Code:

x_position = get_integer("I preffer object0.x",0);
y_position = get_integer("I preffer object0.y",0);
my_width = get_integer("use - to start at right most then go left most of current x to desired pixels to save but do not use - to start at left most then go right of current x to desired pixels to save")
my_height = my_width = get_integer("use - to start at bottom most then go up most of current y to desired pixels to save but do not use - to start at top most then go down of current x to desired pixels to save")
savefileyeahman = get_string("Save as what.png",0);
screen_save_part(savefileyeahman,x_position,y_position,my_width,my_height);