add cluster graphics and transmission simulation

transmission.py

@@ -0,0 +1,28 @@
+from engine import Engine
+
+class Transmission:
+    def __init__(self, engine):
+        self.clutch_pressure = 0
+        self.gear_ratios = [0,216,108,72,54,43,36]
+        self.selected_gear = 0
+        self.max_gear = 6
+        self.min_gear = -1
+        self.inertia = 0
+
+        self.engine = engine
+    
+    def upshift(self):
+        self.selected_gear = min(self.selected_gear + 1, self.max_gear)
+        print(self.selected_gear)
+    
+    def downshift(self):
+        self.selected_gear = max(self.selected_gear - 1, self.min_gear)
+        print(self.selected_gear)
+    
+    def get_velocity(self):
+        if (self.selected_gear == 0):
+            return 0
+        return self.engine.rpm / self.gear_ratios[self.selected_gear]
+    
+    def calculate_load(self):
+        return