Add timer.py

Class to control fps in game

timer.py

@@ -0,0 +1,18 @@
+from time import time
+
+
+class Timer:
+    def __init__(self) -> None:
+        self.running = False
+        self.old = 0
+
+    def control_fps(self, fps: int) -> int:
+        if not self.running:
+            self.old = time()
+            return
+
+        delay_between_frames = 1 / fps
+        now = time()
+        while now - self.old < delay_between_frames:
+            now = time()
+        self.old = now