lignes

void lignes () {
background (250);
stroke (0);
line (10, 10, 410, 10);
line (10, 110, 410, 110);
line (10, 210, 410, 210);
line (10, 310, 410, 310);
line (10, 410, 410, 410);
line (10, 10, 10, 410);
line (110, 10, 110, 410);
line(210, 10, 210, 410);
line (310, 10, 310, 410);
line (410, 10, 410, 410);
}