Added new classes

Edited player.get_damage() function

interface.py

@@ -0,0 +1,38 @@
+import pygame
+
+class UIelement(object):
+    def __init__(self, screen, name, posx, posy) -> None:
+        self.screen = screen
+        self.name = name
+        self.posx = posx
+        self.posy = posy
+        pass
+    pass
+
+class Healthbar(UIelement):
+    def __init__(self, screen, name, posx, posy, width, height,playerhealth) -> None:
+        super().__init__(screen, name, posx, posy)
+        self.width = width
+        self.height = height
+        self.max_width = width
+        self.max_health = playerhealth
+        self.health = playerhealth
+
+    def update(self, playerheatlh):
+        grundwert = self.max_health
+        prozentwert = playerheatlh
+        prozent = (playerheatlh/grundwert)
+        print(prozent)
+        print(prozentwert)
+        print(playerheatlh)
+        
+        #Update until playerhealth not zero
+        if(self.health > 0):
+            res = self.max_width*prozent
+            self.health = res
+        elif self.health < 0:
+            self.health = 0
+            
+    def render(self, screen):
+        pygame.draw.rect(screen, (255,0,0), (self.posx, self.posy, self.health, self.height))
+        pass