diff --git a/sin.py b/sin.py
new file mode 100644
index 0000000..986060a
--- /dev/null
+++ b/sin.py
@@ -0,0 +1,13 @@
+import pygame,sys
+import math
+pygame.init()
+screen = pygame.display.set_mode([640,480])
+screen.fill([249,204,226])
+for x in range(0,640):
+    y = int(math.sin(x/640.0*4*math.pi)*200+240)
+    pygame.draw.rect(screen,[0,0,0],[x,y,1,1],1)
+pygame.display.flip()
+while True:
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            sys.exit()