#lang racket (require (planet wcy/mpost-wrapper)) (provide main) (define (A-B-C) (values (point 0 0) (point '1cm 0) (point 0 '1cm))) (define (main) (call-with-values A-B-C (lambda (A B C) (draw (op-- A B C 'cycle)) (for ((a-point (in-list (list A B C)))) (fill (fullcircle '4bp a-point) #:withcolor 'white)) (for ((a-point (in-list (list A B C)))) (draw (fullcircle '4bp a-point))))))