diff --git a/grid.py b/grid.py
new file mode 100644
index 0000000..d63e5a9
--- /dev/null
+++ b/grid.py
@@ -0,0 +1,168 @@
+# Import the pygame module
+import pygame
+
+# Import pygame.locals for easier access to key coordinates
+# Updated to conform to flake8 and black standards
+from pygame.locals import (
+    K_UP,
+    K_DOWN,
+    K_LEFT,
+    K_RIGHT,
+    K_ESCAPE,
+    K_SPACE,
+    KEYDOWN,
+    QUIT,
+)
+
+# Initialize pygame
+pygame.init()
+
+# Grid size
+GSIZE = 10
+
+# This sets the WIDTH and HEIGHT of each grid location
+WIDTH = 35
+HEIGHT = 35
+
+# This sets the margin between each cell
+MARGIN = 5
+
+# Window size
+SCREEN_WIDTH = GSIZE * (WIDTH + MARGIN) + MARGIN 
+SCREEN_HEIGHT = GSIZE * (HEIGHT + MARGIN) + MARGIN
+
+# Set some colors
+BLACK = (0, 0, 0)
+WHITE = (255, 255, 255)
+GREEN = (0, 255, 0)
+RED = (255, 0, 0)
+BROWN = (140, 95, 65)
+DBROWN = (65, 50, 20)
+YELLOW = (255, 255, 0)
+BLUE = (0, 0, 255)
+
+
+# Define a Tractor object by extending pygame.sprite.Sprite
+# The surface drawn on the screen is now an attribute of 'tractor'
+class Tractor(pygame.sprite.Sprite):
+    def __init__(self):
+        super(Tractor, self).__init__()
+        self.surf = pygame.Surface((WIDTH, HEIGHT))
+        self.surf.fill(RED)
+        self.rect = self.surf.get_rect(topleft=(MARGIN, MARGIN))
+        self.position = [0, 0]
+
+    def update(self, pressed_keys):
+        if pressed_keys[K_UP]:
+            self.rect.move_ip(0, -(HEIGHT + MARGIN))
+            self.position[1] -= 1
+        if pressed_keys[K_DOWN]:
+            self.rect.move_ip(0, HEIGHT + MARGIN)
+            self.position[1] += 1 
+        if pressed_keys[K_LEFT]:
+            self.rect.move_ip(-(WIDTH + MARGIN), 0)
+            self.position[0] -= 1 
+        if pressed_keys[K_RIGHT]:
+            self.rect.move_ip(WIDTH + MARGIN, 0)
+            self.position[0] += 1
+
+        if self.rect.left < MARGIN:
+            self.rect.left = MARGIN
+        if self.position[0] < 0:
+            self.position[0] = 0
+        if self.rect.right > SCREEN_WIDTH-MARGIN:
+            self.rect.right = SCREEN_WIDTH-MARGIN
+        if self.position[0] >= GSIZE-1:
+            self.position[0] = GSIZE-1
+        if self.rect.top <= MARGIN:
+            self.rect.top = MARGIN
+        if self.position[1] < 0:
+            self.position[1] = 0
+        if self.rect.bottom >= SCREEN_HEIGHT-MARGIN:
+            self.rect.bottom = SCREEN_HEIGHT-MARGIN
+        if self.position[1] >= GSIZE-1:
+            self.position[1] = GSIZE-1
+
+    def hydrate(self, field):
+        field[self.position[0]][self.position[1]].hydrate()
+
+# Define a Field object by extending pygame.sprite.Sprite
+# The surface drawn on the screen is now an attribute of 'field'
+class Field(pygame.sprite.Sprite):
+    def __init__(self, row, column):
+        super(Field, self).__init__()
+        self.surf = pygame.Surface((WIDTH, HEIGHT))
+        self.surf.fill(BROWN)
+        self.rect = self.surf.get_rect(topleft=((MARGIN + WIDTH) * row + MARGIN, (MARGIN + HEIGHT) * column + MARGIN))
+        self.hydration = 0
+
+    def hydrate(self):
+        if self.hydration <= 3: 
+            self.hydration += 1
+            if self.hydration == 1:
+                self.surf.fill(YELLOW)
+            if self.hydration == 2:
+                self.surf.fill(GREEN)
+            if self.hydration == 3:
+                self.surf.fill(BLUE)
+
+# Name the window
+pygame.display.set_caption("Inteligentny Traktor")
+
+# Create the screen object
+# The size is determined by the constant SCREEN_WIDTH and SCREEN_HEIGHT
+screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
+
+# Instantiate tractor. Right now, this is just a rectangle.
+tractor = Tractor()
+
+# Create field array
+field = []
+
+for row in range(GSIZE):
+    field.append([])
+    for column in range(GSIZE):
+        fieldbit = Field(row, column)
+        field[row].append(fieldbit)
+
+# Variable to keep the main loop running
+running = True
+
+clock = pygame.time.Clock()
+
+# Main loop
+while running:
+    # Look at every event in the queue
+    for event in pygame.event.get():
+        # Did the user hit a key?
+        if event.type == KEYDOWN:
+            # Was it the Escape key? If so, stop the loop.
+            if event.key == K_ESCAPE:
+                running = False
+
+        # Did the user click the window close button? If so, stop the loop.
+        elif event.type == QUIT:
+            running = False
+
+    pressed_keys = pygame.key.get_pressed()
+
+    # Set the screen background
+    tractor.update(pressed_keys)
+    if pressed_keys[K_SPACE]:
+        tractor.hydrate(field)
+
+    screen.fill(DBROWN)
+    
+    # Draw the field
+    for row in range(GSIZE):
+        for column in range(GSIZE):
+            screen.blit(field[row][column].surf, field[row][column].rect)
+
+    # Draw the player on the screen
+    screen.blit(tractor.surf, tractor.rect)
+
+    # Update the screen                          
+    pygame.display.flip()
+
+    # Ensure program maintains a rate of 30 frames per second
+    clock.tick(5)