added not instruction and escape sequences

test2.grnd

@@ -1,5 +1,39 @@
-stdout "Type something: "
-stdin &myString
-stdout "You said: "
-stdout $myString
+set &number 4
+set &stop 0
+
+fun -double !mod -double &in -double &modulus
+    lesser $in $modulus &store
+    not $store &store
+    if $store %downloop
+
+    lesser $in 0 &store
+    if $store %uploop
+
+    jump %end
+
+    @downloop
+    subtract $in $modulus &in
+    lesser $in $modulus &store
+    not $store &store
+    if $store %downloop
+    jump %end
+
+    @uploop
+    add $in $modulus &in
+    lesser $in 0 &store
+    if $store %uploop
+    jump %end
+
+    @end
+    return $in
+endfun
+
+@loop
+equal $number 1 &stop
+if $stop %end
+
+
+jump %loop
+
+@end
 end 0