diff --git a/Semaphore.c b/Semaphore.c
index e69de29..07a23db 100644
--- a/Semaphore.c
+++ b/Semaphore.c
@@ -0,0 +1,37 @@
+#include <stdio.h>
+
+typedef struct sem_t
+{
+    ;
+} sem_t;
+
+void* ThreadOne(void* voidPass);
+void* ThreadTwo(void* voidPass);
+void sem_post(sem_t* semaphore);
+void sem_wait(sem_t* semaphore);
+
+sem_t aArrived, bArrived;
+
+
+int main(void)
+{
+    return 0;
+}
+
+//  Thread A for testing multithread
+void* ThreadOne(void* voidPass)
+{
+    printf("a1\n");
+    sem_post(&aArrived);
+    sem_wait(&bArrived);
+    printf("a2\n");
+}
+
+//  Thread B for testing multithread
+void* ThreadTwo(void* voidPass)
+{
+    printf("b1\n");
+    sem_post(&bArrived);
+    sem_wait(&aArrived);
+    printf("b2\n");
+}
diff --git a/TestSemaphore.sh b/TestSemaphore.sh
index 9d552c7..881f0f1 100755
--- a/TestSemaphore.sh
+++ b/TestSemaphore.sh
@@ -1,3 +1,4 @@
 #!/bin/bash
 rm Semaphore.out
 gcc Semaphore.c -o Semaphore.out
+./Semaphore.out