leave a mark on pen down (fix #209)

1 files changed, 1 insertions, 0 deletions

diff --git a/morphic.js b/morphic.js
index 4e18482..b8b176c 100644
--- a/morphic.js
+++ b/morphic.js
@@ -4097,6 +4097,7 @@ PenMorph.prototype.forward = function (steps) {
 
 PenMorph.prototype.down = function () {
     this.isDown = true;
+    this.drawLine(this.center(), this.center());
 };
 
 PenMorph.prototype.up = function () {