// flecha azul na orixe
color("blue")scale([1,0.5,1])cylinder(r = 5, h = 3, $fn = 3);
// flecha verde 
translate([30,0,0])rotate([0,0,30])
color("green")scale([1,0.5,1])cylinder(r = 5, h = 3, $fn = 3);
//flecha vermella
rotate([0,0,30])translate([30,0,0])
color("red")scale([1,0.5,1])cylinder(r = 5, h = 3, $fn = 3);