# New to Bangle.js and Espruino. Need help with graphics

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• This might do the kind of thing you're after. By drawing just the poly (rather than using circles) you can avoid some flicker on the Bangle's unbuffered screen...

It's a good thing to try yourself though if you're interested - it's not that hard to use sin and cos and once you've got the hang of it it's really useful for a bunch of stuff

``````var n=0;

function drawSlice(from,to) {
var a, res = 24;
var x = 120, y = 120, r1 = 75, r2 = 95;
var poly = [];
for (var i=from*res;i<to*res;i++) {
a = i*Math.PI*2/res;
poly.push(x+r2*Math.sin(a), y+r2*Math.cos(a));
poly.unshift(x+r1*Math.sin(a), y+r1*Math.cos(a));
}
a = to*Math.PI*2;
poly.push(x+r2*Math.sin(a), y+r2*Math.cos(a));
poly.unshift(x+r1*Math.sin(a), y+r1*Math.cos(a));

g.fillPoly(poly);
}

function draw() {
n += 0.01;
if (n>=1) n=0;
g.setColor(1,0,0);
drawSlice(n,1);
g.setColor(0,1,0);
drawSlice(0,n);
}

setInterval(draw, 100);
``````
• Hi,
Thanks a lot for encouraging me to try this out and for your suggestions.
I shall definitely try it out.
Thanks so much for your time to share the code example with me as well.