//experiement
$shape-1: "M 100 600 q 0 -700, 500 -500 t 500 500 t -500 500 T 100 600 z";
$shape-2: "M 100 600 q -50 -400, 500 -500 t 450 550 t -500 500 T 100 600 z";
$shape-3: "M 100 600 q 0 -400, 500 -500 t 400 500 t -500 500 T 100 600 z";
$shape-4: "M 150 600 q 0 -600, 500 -500 t 500 550 t -500 500 T 150 600 z";
$shape-5: "M 150 600 q 0 -600, 500 -500 t 500 550 t -500 500 T 150 600 z";
$shape-6: "M 100 600 q 100 -600, 500 -500 t 400 500 t -500 500 T 100 600 z";