diff --git a/falling_sand.py b/falling_sand.py
index e89c509..647efad 100644
--- a/falling_sand.py
+++ b/falling_sand.py
@@ -175,6 +175,10 @@ class FallingSand:
             elif event.type == pygame.VIDEORESIZE:
                 self.window_update(event.size)
 
+            elif event.type == pygame.KEYDOWN:
+                if event.key == pygame.K_r:
+                    self.reset_sand_particles()
+
     def exit(self):
         self.running = False
 
@@ -228,6 +232,11 @@ class FallingSand:
 
         return tuple(color)
 
+    def reset_sand_particles(self):
+        self.falling_sand_particles.clear()
+        self.sand_surface.fill(self.gray)
+        self.rainbow_data = [[255, 40, 40], 0]
+
 
 if __name__ == "__main__":
     sand = FallingSand()