diff --git a/lib/assets/Lib/browser/timer.py b/lib/assets/Lib/browser/timer.py
new file mode 100644
--- /dev/null
+++ b/lib/assets/Lib/browser/timer.py
@@ -0,0 +1,34 @@
+from browser import window
+
+def wrap(func):
+    # Transforms a function f into another function that prints a
+    # traceback in case of exception
+    def f(*args, **kw):
+        try:
+            return func(*args, **kw)
+        except Exception as exc:
+            msg = '{0.info}\n{0.__name__}: {0.args[0]}'.format(exc)
+            import sys
+            sys.stderr.write(msg)
+    return f
+
+clear_interval = window.clearInterval
+    
+clear_timeout = window.clearTimeout
+
+def set_interval(func,interval):
+    return window.setInterval(wrap(func),interval)
+
+def set_timeout(func,interval):
+    return int(window.setTimeout(wrap(func),interval))
+
+def request_animation_frame(func):
+    return int(window.requestAnimationFrame(func))
+
+def cancel_animation_frame(int_id):
+    window.cancelAnimationFrame(int_id)
+
+def set_loop_timeout(x):
+    # set a variable used to stop loops that last more than x seconds
+    assert isinstance(x, int)
+    __BRYTHON__.loop_timeout = x
\ No newline at end of file