Hi! This script works. radius = 10;angles = [0, 90]; points = [    for(a = [angles[0]:1:angles[1]]) [radius * cos(a), radius * sin(a)]];polygon(concat([[0, 0]], points));-.._..--.._..--.._..--.._..--.._..--.._..--.._..--.._..--.._..--.._..--.._..--.._..--.._..--.._..- I was trying to create a function() to do the same thing. (but failed) radius = 10;start = 0;stop =90; points = test;polygon(concat([[0, 0]], points)); function test(radius = 10, start=0, stop=90){    angles = [start,  stop];    for(a = [angles[0]:1:angles[1]])         [radius * cos(a), radius * sin(a)]];}