diff --git a/code/__pycache__/sprites.cpython-310.pyc b/code/__pycache__/sprites.cpython-310.pyc
index 4d785eb..13689d0 100644
Binary files a/code/__pycache__/sprites.cpython-310.pyc and b/code/__pycache__/sprites.cpython-310.pyc differ
diff --git a/code/simulation.py b/code/simulation.py
index e7d98b0..bfa1805 100644
--- a/code/simulation.py
+++ b/code/simulation.py
@@ -14,8 +14,32 @@ clock = pygame.time.Clock()
 player = pygame.sprite.GroupSingle()
 player.add(sprites.Player())
 
-top_street_boarder = pygame.Rect(0, 50, SCREEN_WIDTH, 4)
+streets = pygame.sprite.Group()
+street_1 = sprites.Streets(0, 100, SCREEN_WIDTH, 4)
+street_2 = sprites.Streets(0, 200, SCREEN_WIDTH, 4)
+streets.add(street_1)
+streets.add(street_2)
 
+lanterns = pygame.sprite.Group()
+lantern_list = []
+detectors = pygame.sprite.Group()
+detectors_list = []
+id = 1
+ 
+for y_pos in range(50, 251, 200):
+    x_pos = 100
+    while x_pos < SCREEN_WIDTH:  
+        lantern = sprites.Lanterns(x_pos, y_pos, 25, 25, id)
+        lantern_list.append(lantern)
+        detector = sprites.Detectors(x_pos, y_pos, 133, 300, id)
+        detectors_list.append(detector)
+        x_pos += 150
+        id += 1
+    
+for item in lantern_list:
+    lanterns.add(item)
+for item in detectors_list:
+    detectors.add(item)
 
 
 if __name__ == "__main__":
@@ -26,16 +50,27 @@ if __name__ == "__main__":
                 run = False
 
         
-        screen.fill("Grey")
+        screen.fill("Grey")  
+        detectors.draw(screen)
+        streets.draw(screen)
+        lanterns.draw(screen)
         player.draw(screen)
         player.update()
-        
 
-        #pygame.draw.rect(screen, (0, 0, 0), line)
+        for lantern in lanterns:
+            lantern.reset_light()
 
-        #if stickman_rect.colliderect(line):
-        #    stickman_rect.y = 55
+        # Check for collision and light up corresponding lantern
+        collisions = pygame.sprite.spritecollide(player.sprite, detectors, False)
+        for detector in collisions:
+            for lantern in lanterns:
+                if lantern.id == detector.id:
+                    lantern.light_up()
 
+        if pygame.sprite.spritecollide(player.sprite, streets, False):
+            player.sprite.set_back()
+
+            
         pygame.display.update()
         clock.tick(60)
 
diff --git a/code/sprites.py b/code/sprites.py
index 418e2e5..700af23 100644
--- a/code/sprites.py
+++ b/code/sprites.py
@@ -10,7 +10,9 @@ class Player(pygame.sprite.Sprite):
         self.player_direction = [player_right, player_left]
 
         self.image = self.player_direction[0]
-        self.rect = self.image.get_rect(topleft = (0, 55))   
+        self.rect = self.image.get_rect(center = (0, 150))   
+
+        
 
     def player_inputs(self):
         key = pygame.key.get_pressed()
@@ -25,5 +27,42 @@ class Player(pygame.sprite.Sprite):
         if key[pygame.K_w]:
             self.rect.y -= 3
 
+    def get_last_position(self):
+        self.last_position = self.rect.topleft
+
+    def set_back(self):
+        self.rect.topleft = self.last_position
+
     def update(self):
-        self.player_inputs()
\ No newline at end of file
+        self.get_last_position()
+        self.player_inputs()
+        
+
+class Streets(pygame.sprite.Sprite):
+    def __init__(self, left, top, width, height):
+        super().__init__()
+        self.image = pygame.Surface([width, height])
+        self.image.fill((0, 0, 0))  
+        self.rect = self.image.get_rect(topleft=(left, top))
+
+class Lanterns(pygame.sprite.Sprite):
+    def __init__(self, left, top, width, height, id):
+        super().__init__()
+        self.image = pygame.Surface([width, height])
+        self.image.fill((0, 0, 0))  
+        self.rect = self.image.get_rect(center=(left, top))
+        self.id = id
+    
+    def light_up(self):
+        self.image.fill((255, 255, 0))
+    
+    def reset_light(self):
+        self.image.fill((0, 0, 0))
+
+class Detectors(pygame.sprite.Sprite):
+    def __init__(self, left, top, width, height, id):
+        super().__init__()
+        self.image = pygame.Surface([width, height])
+        self.image.fill("Grey")  
+        self.rect = self.image.get_rect(center=(left, top))
+        self.id = id