Merge pull request #1348 from CodingTrain/genuary-1

Update _redirects

Author: shiffman

static/_redirects

@@ -58,3 +58,5 @@
 /raycasting /challenges/145-ray-casting-2d 302!
 /p5js /tracks/code-programming-with-p5-js 302!
 /processing /tracks/learning-processing 302!
+/genuary1 https://editor.p5js.org/codingtrain/sketches/vN8EEr59I 302!
+/particles https://thecodingtrain.com/challenges/78-simple-particle-system 302!