Fix error with flickering ball2

Author: Jethet

bouncing_ball/bounceball.py

@@ -3,7 +3,7 @@
 pygame.init()
 
 size = width, height = 620, 540
-speed1 = [2, 2]
+speed1 = [1.5, 1.5]
 speed2 = [1, 1]
 black = 0, 0, 0
 
@@ -13,9 +13,9 @@
 img1 = pygame.image.load("ball1.png")
 img2 = pygame.image.load("ball2.png")
 ball1 = pygame.transform.scale(img1, (65, 65))
-ball2 = pygame.transform.scale(img2, (65, 65))
+ball2 = pygame.transform.scale(img2, (63, 63))
 ballrect1 = ball1.get_rect()
-ballrect2 = ball2.get_rect()
+ballrect2 = ball2.get_rect(topleft=(100, 300))
 
 while 1:
     for event in pygame.event.get():
@@ -34,11 +34,11 @@
         speed2[0] = -speed2[0]
     if ballrect2.top < 0 or ballrect2.bottom > height:
         speed2[1] = -speed2[1]
-
+    
     screen.fill(black)
 
     screen.blit(ball1, ballrect1)
-    pygame.display.flip()
+    # pygame.display.flip()
 
     screen.blit(ball2, ballrect2)
     pygame.display.flip()

notes.md

@@ -91,3 +91,12 @@ Variables needed with example code:
 font = `pygame.font.SysFont("comicsans", 30, True, True)` (True stands for bold and italic)
 text = `font.render("myText")` => this creates a surface that can be blit onto the screen (same as blitting an imange)
 
+**Keys**  
+To use key press for jumping, increasing speed, shooting bullets etc. write:  
+    `keys = pygame.key.get_pressed()`
+and use the key constants (K_xxx) as follows:  
+K_SPACE               space
+K_UP                  up arrow
+K_DOWN                down arrow
+K_RIGHT               right arrow
+K_LEFT                left arrow