diff --git a/MultiFunctionShield.ino b/MultiFunctionShield.ino
new file mode 100644
index 0000000..a46282c
--- /dev/null
+++ b/MultiFunctionShield.ino
@@ -0,0 +1,94 @@
+//This project is made by Kutay Yavuz.
+//https://github.com/kutaygs/Multi-Function-Shield-Arduino
+//Please contact me to be contributor(kutayyavuz03@hotmail.com).
+
+#include <TimerOne.h>
+#include <Wire.h>
+#include <MultiFuncShield.h>
+enum CountDownModeValues
+{
+ COUNTING_STOPPED,
+ COUNTING
+};
+byte countDownMode = COUNTING_STOPPED;
+byte tenths = 0;
+char seconds = 0;
+char minutes = 0;
+void setup() {
+ // put your setup code here, to run once:
+ Timer1.initialize();
+ MFS.initialize(&Timer1);
+ MFS.write(0);
+
+ Serial.begin(9600);
+}
+void loop() {
+ byte btn = MFS.getButton();
+
+ switch (countDownMode)
+ {
+ case COUNTING_STOPPED:
+ if (btn == BUTTON_1_SHORT_RELEASE && (minutes + seconds) > 0)
+ {
+ countDownMode = COUNTING;
+ }
+ else if (btn == BUTTON_1_LONG_PRESSED)
+ {
+ tenths = 0;
+ seconds = 0;
+ minutes = 0;
+ MFS.write(minutes*100 + seconds);
+ }
+ else if (btn == BUTTON_2_PRESSED || btn == BUTTON_2_LONG_PRESSED)
+ {
+ minutes++;
+ if (minutes > 60)
+ {
+ minutes = 0;
+ }
+ MFS.write(minutes*100 + seconds);
+ }
+ else if (btn == BUTTON_3_PRESSED || btn == BUTTON_3_LONG_PRESSED)
+ {
+ seconds += 10;
+ if (seconds >= 60)
+ {
+ seconds = 0;
+ }
+ MFS.write(minutes*100 + seconds);
+ }
+ break;
+
+ case COUNTING:
+ if (btn == BUTTON_1_SHORT_RELEASE || btn == BUTTON_1_LONG_RELEASE)
+ {
+ countDownMode = COUNTING_STOPPED;
+ }
+ else
+ {
+ tenths++;
+
+ if (tenths == 10)
+ {
+ tenths = 0;
+ seconds--;
+
+ if (seconds < 0 && minutes > 0)
+ {
+ seconds = 59;
+ minutes--;
+ }
+
+ if (minutes == 0 && seconds == 0)
+ {
+ MFS.beep(50, 50, 3); 
+ countDownMode = COUNTING_STOPPED;
+ }
+
+ MFS.write(minutes*100 + seconds);
+ }
+ delay(100);
+ }
+ break;
+ }
+}