your code
//duikboot
submarine(400,300);
//duiker
diver(100,100,50);
//zeesterren
star(50,50,"green");
star(50,350,"pink");
star(350,50,"red");
star(200,100,"purple");
//zuurstof
oxygen(100,50,100);
oxygen(50,100,25);
oxygen(50,150,1400);
oxygen(400,400,400);
oxygen(200,200,200);
//obstakels
urchin(150,50);
urchin(150,100);
urchin(150,150);
urchin(150,200);
urchin(150,250);
urchin(150,300);
urchin(450,50);
urchin(400,50);
urchin(400,100);
urchin(350,100);
urchin(300,100);
urchin(200,250);
urchin(250,250);
urchin(250,200);
octopus(50,400,450,400);
//duiker parcour