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                const frame = new Frame("fit", 1024, 768, dark, darker);
frame.on("ready", ()=>{ // ES6 Arrow Function - similar to function(){}
    zog("ready from ZIM Frame"); // logs in console (F12 - choose console)

    // often need below - so consider it part of the template
    let stage = frame.stage;
    let stageW = frame.width;
    let stageH = frame.height;

    // REFERENCES for ZIM at
    // see for video and code tutorials
    // see for documentation
    // see for INTRO to ZIM
    // see for INTRO to CODE

    // CODE HERE
	// a remake of Florin Pop Pen
	// with ZIM being 54% the size of code the developer would code
	// not that there is anything wrong with Florin's excellent code
	// just HTML/CSS/JS could be more efficient 
	new Label("Press a dot!", 30, null, blue).pos(0,40,CENTER,TOP);
	// obj, cols, rows, spacingH, spacingV
	const container = new Tile(new Circle(10, white), 15, 15, 20, 20)
			// each tile element is given col and row index properties
	function growCircles(i,j) {
		// the items property will give items by index in container if desired but can 
		// can access tile items by row and col with items2D property 
		// or access tile items by col and row with items2DCols property
		// we are getting items next to current item
		// so test to make sure we are not off the edge
		if (container.items2D[j] && container.items2D[j][i]) {
			let circle = container.items2D[j][i];
			if (!circle.animating) {
				timeout(.1, () => {
					growCircles(i-1, j);
					growCircles(i+1, j);
					growCircles(i, j-1);
					growCircles(i, j+1);

    stage.update(); // this is needed to show any changes
    // FOOTER
    // call remote script to make ZIM Foundation for Creative Coding icon

}); // end of ready