# Imports go at the top
from microbit import *
import time
from math import *
display.off()
segs = [0,1,2,3,4,5,6,7,8,9]
segs[0] = [0,0,0,0,0,0,1]
segs[1] = [1,0,0,1,1,1,1]
segs[2] = [0,0,1,0,0,1,0]
segs[3] = [0,0,0,0,1,1,0]
segs[4] = [1,0,0,1,1,0,0]
segs[5] = [0,1,0,0,1,0,0]
segs[6] = [0,1,0,0,0,0,0]
segs[7] = [0,0,0,1,1,1,1]
segs[8] = [0,0,0,0,0,0,0]
segs[9] = [0,0,0,0,1,0,0]
def digit1(val): #sets up segment wires
    pin3.write_digital(segs[val][0])
    pin0.write_digital(segs[val][1])
    pin4.write_digital(segs[val][2])
    pin6.write_digital(segs[val][3])
    pin7.write_digital(segs[val][4])
    pin1.write_digital(segs[val][5])
    pin8.write_digital(segs[val][6])
    pin2.write_digital(1)
    time.sleep(0.01)
    pin2.write_digital(0)
def digit2(val): #sets up segment wires
    pin3.write_digital(segs[val][0])
    pin0.write_digital(segs[val][1])
    pin4.write_digital(segs[val][2])
    pin6.write_digital(segs[val][3])
    pin7.write_digital(segs[val][4])
    pin1.write_digital(segs[val][5])
    pin8.write_digital(segs[val][6])
    pin13.write_digital(1)
    time.sleep(0.01)
    pin13.write_digital(0)
def digit3(val): #sets up segment wires
    pin3.write_digital(segs[val][0])
    pin0.write_digital(segs[val][1])
    pin4.write_digital(segs[val][2])
    pin6.write_digital(segs[val][3])
    pin7.write_digital(segs[val][4])
    pin1.write_digital(segs[val][5])
    pin8.write_digital(segs[val][6])
    pin14.write_digital(1)
    time.sleep(0.01)
    pin14.write_digital(0)
def digit4(val): #sets up segment wires
    pin3.write_digital(segs[val][0])
    pin0.write_digital(segs[val][1])
    pin4.write_digital(segs[val][2])
    pin6.write_digital(segs[val][3])
    pin7.write_digital(segs[val][4])
    pin1.write_digital(segs[val][5])
    pin8.write_digital(segs[val][6])
    pin15.write_digital(1)
    time.sleep(0.01)
    pin15.write_digital(0)
for i in range(9999,-1,-1): 
    d = int(i%10)
    c = int(int(i/10)%10)
    b = int(int(i/100)%10)
    a = int(int(i/1000)%10)
    for x in range(50): 
        digit1(a)
        digit2(b)
        digit3(c)
        digit4(d)