open Sdl let () = let width, height = (320, 240) in Sdl.init [`VIDEO]; let window, renderer = Render.create_window_and_renderer ~width ~height ~flags:[] in let rgb = (255, 0, 0) and a = 255 in Render.set_draw_color renderer ~rgb ~a; Render.draw_point renderer (100, 100); Render.render_present renderer; Timer.delay 3000; Sdl.quit ()