psadil

function exit_stat = DrawLeftArrowToOffScreenDemo()
exit_stat = 0;


PsychDefaultSetup(2); % assert OpenGL install, unify keys, fix color range
screenNumber = max(Screen('Screens')); % Choose a monitor to display on
[window, winRect] = Screen('OpenWindow', screenNumber, ...
    (2/3)*WhiteIndex(screenNumber)); 

arrowTexture = makeLeftArrowTex(screenNumber, winRect(3)/2, winRect(4)/2, winRect(3)/2 - 100, winRect(4)/2);