# Snake

``````# micro:bit tetris by pddring
# source: blog.withcode.uk

from microbit import *

# determines how fast the game is
FRAME_DELAY = 75
FRAMES_PER_MOVE = 4

# start game animation
smile = Image.HAPPY
sleep(500)
for i in range(9):
display.show(smile * (i / 9.0))
sleep(50)

# show countdown
display.show("321!")

# define 4 different blocks in 4 different rotations
blocks = [["000:010:000" for i in range(4)],
["000:111:000", "010:010:010"] * 2,
["011:011:000"] * 4,
["010:011:000", "011:010:000", "011:001:000", "001:011:000"]]

# builds up with bricks
clutter = Image("00000:00000:00000:00000:00000")

# get an image of a block
def get_block(type, rot):
global block_type, rotation, blocks
block_type = type % 4
rotation = rot % 4
return Image("00000:" + ":".join(["0" + l.replace("1", "9") + "0" for l in blocks[block_type][rotation].split(":")]) + ":00000")

# check if a falling block is about to crash
for y in range(5):
if y < 4:
for x in range(5):
if i.get_pixel(x,y) > 0 and screen.get_pixel(x,y + 1) > 0:
return True
else:
for x in range(5):
if i.get_pixel(x,y) > 0:
return True
return False

# game data
block_type = 0
rotation = 0
y = 5
x = 0
score = 0
frame = 0

# main game loop
while(True):
b = get_block(block_type, rotation)
sleep(FRAME_DELAY)

# move left / right
if button_a.was_pressed():
x -= 1
if button_b.was_pressed():
x += 1

# allow user to move a block multiple times before it falls
frame += 1
if frame % FRAMES_PER_MOVE != 0:
continue

# move brick
score += 1

if y > 0:
b = b.shift_up(y)
else:
b = b.shift_down(-y)
if x > 0:
b = b.shift_right(x)
else:
b = b.shift_left(-x)

if x > 2:
x = 2
if x < -2:
x = -2
y -= 1
if y < -5:
y = 5
block_type += 1

# check if a whole line has been filled
lines = repr(clutter).replace("Image('","").replace(":')","").split(":")
for row in range(5):
if lines[row] == "99999":
lines.pop(row)
clutter = Image("00000:" + ":".join(lines))
break

# check if game is over
if lines[0] != "00000":
display.scroll("Score: " + str(score))
break

# show falling block on top of background
display.show(b + clutter)

# create new block if one's fallen as far as it can
clutter = b + clutter
y = 5
block_type += 1
rotation += 1
x = 0

# rotate block with accelerometer
if accelerometer.get_x() < -400:
rotation -= 1

if accelerometer.get_x() > 400:
rotation += 1
``````

Source: https://blog.withcode.uk/2016/12/microbit-tetris-in-python/