diff --git a/samples/pwm-sierpinski.c b/samples/pwm-sierpinski.c
new file mode 100644
index 0000000..b6fa0bb
--- /dev/null
+++ b/samples/pwm-sierpinski.c
@@ -0,0 +1,6 @@
+// "pwm serpinski harmony" by SArpnt
+// URL: https://www.reddit.com/r/bytebeat/comments/g9106h/pwm_serpinski_harmony/
+
+// RENDER PARAMETERS: sample_rate = 8000, final_sample_rate = 44100
+
+t&(t>>7)-t&t>>8