Added Clockhands (changed hello by adding a main def)

Author: Undalevein

mojo/clockhands.mojo

@@ -0,0 +1,13 @@
+def pad(n) -> String:
+    return ("0{}" if n < 10 else "{}").format(n)
+
+def main():
+    for i in range(11):	
+        t = (43200 * i + 21600) // 11
+        h = t // 3600
+        m = t // 60 % 60
+        s = t % 60
+        print("{}:{}:{}".format(pad(h or 12), pad(m), pad(s)))
+
+
+https://gist.github.com/modularbot/cc4f5e8c5d6e2789a5b9b0328b2174bd

mojo/hello.mojo

@@ -1 +1,2 @@
-print("Hello, world")
+def main():
+    print("Hello, world")