Jump Parkour

local blocksInFront = 4
local blocksBehind = 10
local tpBackUp = true
local checkBlockBelow = true

local jumps = {}

for i=0,1 do
  for j=-5,5 do
    for k=-5,5 do
      local jump = vector.new(j,i,k)
      local jumpL = jump:length()
      if jumpL <= 5 and jumpL > 1.5 then
        table.insert(jumps,jump)
      end
    end
  end
end

local function crossingPath(b,p)
  for i=2,#p do
    if (b-p[i]):length() <= 5.1 then
      return true
    end
  end
  return false
end

local blocks = {}
local catcher = vector.new(0,-30,0)
local detecter = vector.new(0,2,0)

local catcherRad = ",27]"

local startP = vector.new(commands.getBlockPosition()) - catcher / 2

local tpCircle

local paraFuncs = {
function()
  repeat
    local newB
    while #blocks <= blocksInFront or not newB do
      repeat
        newB = (blocks[1] or startP) + jumps[math.random(#jumps)]
      until not crossingPath(newB,blocks)
      table.insert(blocks,1,newB)
      commands.setblock(newB.x,newB.y,newB.z,
          "minecraft:wool",math.random(0,15))
    end
    local tplayer = "@p["..tostring(blocks[blocksInFront] + detecter) .. ",1]"
    tpCircle = "@p[" ..tostring(blocks[blocksInFront] + catcher) ..catcherRad
    repeat
    until commands.testfor(tplayer)
    if #blocks > blocksInFront + blocksBehind + 2 then
      local last = blocks[#blocks]
      commands.setblock(last.x,last.y,last.z,"minecraft:air")
      table.remove(blocks)
    end
    if blocks[1].y >= 250 then
      blocksInFront = blocksInFront - 1
    end
  until blocksInFront <= 0
  print("Reached the top of the map")
end,

function()
  print("Press any char to exit")
  os.pullEvent("char")
  print("Programm manuell program exit")
end}

if tpBackUp then
  paraFuncs[3]=function()
    while true do
      if commands.testfor(tpCircle) then
        local checkP = blocks[blocksInFront+1]
        commands.tp(tpCircle,checkP.x,checkP.y+2,checkP.z)
      end
    end
  end
end

if checkBlockBelow then
  table.insert(paraFuncs,function()
    local cur
    repeat
      sleep(1)
      cur = blocks[blocksInFront+1] or vector.new(commands.getBlockPosition())
    until commands.testforblock(cur.x,cur.y,cur.z,"minecraft:air")
    print("Block below was broken")
  end)
end

parallel.waitForAny(unpack(paraFuncs))

commands.tp("@a["..tostring(blocks[1])..catcherRad,commands.getBlockPosition())
for i,j in ipairs(blocks) do
  commands.setblock(j.x,j.y,j.z,"minecraft:air")
end