Code Sketcher Draw And Fade.coscript

/*
This a sample on how to use the COSCodeSketcher class, which add experimental processing.org like functionality to Cocoa Script.
*/

coscript.shouldKeepAround = true;

var sketcher = [COSCodeSketcher codeSketcherWithName:"Draw"];

sketcher.setup = function() {
    [sketcher setSize:NSMakeSize(600, 300)];
    [sketcher clear];
};

sketcher.drawRect = function() {
    [sketcher fillWithColor:[NSColor colorWithCalibratedWhite:1 alpha:.01]];
}

sketcher.mouseDown = function() {
    // reset our points
    m1 = m2 = m3 = m4 = null;
};

sketcher.mouseDragged = function() {
    
    var m0 = [sketcher mouseLocation];
    
    if (m4) {
        [[NSColor colorWithCalibratedWhite:0 alpha:.1] set];
        
        [NSBezierPath strokeLineFromPoint:m0 toPoint:m4]
        [NSBezierPath strokeLineFromPoint:m1 toPoint:m4]
        [NSBezierPath strokeLineFromPoint:m2 toPoint:m4]
        [NSBezierPath strokeLineFromPoint:m3 toPoint:m4]
    }
    
    m4 = m3;
    m3 = m2;
    m2 = m1;
    m1 = m0;
};


[sketcher setFrameRate:30]
[sketcher start];