treasure hunt with flare.py

import time
import mcpi.minecraft as minecraft
import mcpi.block as block
import random
import math
from gpiozero import Button

mc=minecraft.Minecraft.create()

button = Button(21)

safe = False

while safe == False:
    x = random.randint(0,100)
    z = random.randint(0,100)
    y = mc.getHeight(x,z)
    topBlock = mc.getBlock(x,y-1,z)
    if topBlock !=block.WATER.id:
        safe = True

mc.setBlock(x,y,z,block.WOOL.id,2)

found = False

while found == False:
    player = mc.player.getTilePos()
    if button.is_pressed:
        mc.postToChat("Flare ignited")
        add = 2
        while add<20:
            mc.setBlock(x,y+add,z,block.WOOL.id,4)
            time.sleep(0.1)
            mc.setBlock(x,y+add,z,block.AIR)
            add+=1
    xDist = x-player.x
    yDist = y-player.y
    zDist = z-player.z
    vDist = math.sqrt(xDist**2 + zDist**2)
    if vDist <=1:
        mc.postToChat("You Found it")
        time.sleep(2)
        mc.setBlock(x,y,z,block.TNT.id,1)
        found == True
        break
    else:
        mc.postToChat("Distance" + str(math.floor(vDist)))
        time.sleep(2)