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let N=7;
function setup() {
createCanvas(400, 400);
}
function draw() {
background(240);
noStroke();
fill(255,0,0);
for (let i=0; i<N; i++){
for (let j=0; j<N; j++){
//if (i==1 && j==0)
// continue;
if (i==1 && j==1)
continue;
ellipse((i+0.5)*width/N,(j+0.5)*height/N,7,7);
}
}
let x1 = (0.5)*width/N;
let x2 = (2.5)*width/N;
ellipse((x2-x1)/3.0+x1,(1.0)*height/N,7,7);
ellipse((x2-x1)*2/3.0+x1,(1.0)*height/N,7,7);
ellipse((x2-x1)/2.0+x1,(1.8)*height/N,7,7);
}