Add catalog structure and grid of appropriate dimensions

src/main.py

@@ -2,17 +2,17 @@ import sys
 import pygame
 
 pygame.init()
-screen = pygame.display.set_mode((960, 720))
+screen = pygame.display.set_mode((700, 750))
 done = False
-block_size = 60
+block_size = 50
 WHITE = (255, 255, 255)
 BLUE = (0, 0, 255)
 screen.fill(WHITE)
 
 
 def main():
-    for y in range(400):
-        for x in range(300):
+    for y in range(15):
+        for x in range(14):
             rect = pygame.Rect(x * block_size, y * block_size, block_size - 1, block_size - 1)
             pygame.draw.rect(screen, BLUE, rect)