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var rows = 9;
var cols = 9;
var circleDiameter = 4;
var gridX = 50;
var gridY = 50;
function setup() {
createCanvas(500, 500);
background(0);
noStroke();
for (var r = 1; r <= rows; r++) {
for (var c = 1; c <= cols; c++) {
fill(0, 255 / c / 1, 204 / c / 1)
ellipse(r * gridX, c * gridY, r* circleDiameter, r * circleDiameter);
}
}
}