diff --git a/Demos/Arduino/display_num.ino b/Demos/Arduino/display_num.ino
new file mode 100644
index 0000000..7590341
--- /dev/null
+++ b/Demos/Arduino/display_num.ino
@@ -0,0 +1,22 @@
+int pin1 = 8;
+int pin2 = 7;
+int pin3 = 6;
+int pin4 = 5;
+int pin5 = 4;
+int pin6 = 3;
+int pin7 = 2;
+
+void setup() {
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  int x = 101;
+  if((x % 2) > 0) { digitalWrite(pin1, HIGH); } else { digitalWrite(pin1, LOW); }
+  if((x % 4) > 1) { digitalWrite(pin2, HIGH); } else { digitalWrite(pin2, LOW); }
+  if((x % 8) > 3) { digitalWrite(pin3, HIGH); } else { digitalWrite(pin3, LOW); }
+  if((x % 16) > 7) { digitalWrite(pin4, HIGH); } else { digitalWrite(pin4, LOW); }
+  if((x % 32) > 15) { digitalWrite(pin5, HIGH); } else { digitalWrite(pin5, LOW); }
+  if((x % 64) > 31) { digitalWrite(pin6, HIGH); } else { digitalWrite(pin6, LOW); }
+  if((x % 128) > 63) { digitalWrite(pin7, HIGH); } else { digitalWrite(pin7, LOW); }
+}