Basic background in one file

main.py

@@ -0,0 +1,54 @@
+# -*- coding: UTF-8 -*-
+
+### Tangled Mind
+### Author: Arthur 'Grizzly' Grisel-Davy
+
+import pygame
+pygame.init()
+
+
+screen_width = 800
+screen_height = 800
+screen = pygame.display.set_mode((screen_width, screen_height))
+done = False
+
+
+BACKGROUND=(0,0,0)
+WHITE=(255,255,255)
+BLUE=(0,0,255)
+
+posx = 400
+posy = 400
+width=50
+height=50
+
+pygame.draw.rect(screen,BLUE,(posx,posy,width,height))
+
+speed = 1
+
+while not done:
+        for event in pygame.event.get():
+                if event.type == pygame.QUIT:
+                        done = True
+
+        keystate = pygame.key.get_pressed()
+        if keystate[pygame.K_LEFT]:
+            posx -= speed
+            if posx <0:
+            	posx=0
+        if keystate[pygame.K_RIGHT]:
+            posx += speed
+            if posx+width > screen_width:
+            	posx = screen_height-width
+        if keystate[pygame.K_UP]:
+            posy -= speed
+            if posy < 0:
+            	posy = 0
+        if keystate[pygame.K_DOWN]:
+            posy += speed
+            if posy+height > screen_height:
+            	posy = screen_height-height
+
+        screen.fill(BACKGROUND)
+        pygame.draw.rect(screen,BLUE,(posx,posy,width,height))
+        pygame.display.flip()