cockroach

w, h = term.getSize()
startX = math.floor( w / 2 )
startY = math.floor( h / 2 )
x = math.floor( w / 2 )
y = math.floor( h / 2 )
fruitFunc = true
counter = 0
gameSpeed = 0.2



function score()
  paintutils.drawLine(1, 1, w, 1, colors.black)
  term.setCursorPos(1, 1)
  term.setTextColor(colors.yellow)
  write("Score: " .. counter .. " | Current x/y: " .. x .. " " .. y - 1 .. " | Fruit x/y: " .. fruitCoord["x"] .. " " .. fruitCoord["y"])
end

function controls()
  event, key = os.pullEvent("key")
  return key
end

function direction()
 local cont = controls()
  if cont == 17 then return {0, -1}
  elseif cont == 31 then return {0, 1}
  elseif cont == 32 then return {1, 0}
  elseif cont == 30 then return {-1, 0}
  end
end

term.clear()
paintutils.drawPixel(startX, startY, colors.red)

tab = {0, 0}

function smb()
  tab = direction()
  sleep(gameSpeed)
end

function flow()
  paintutils.drawPixel(-1, -1, colors.black)
  x = x + tab[1]
  y = y + tab[2]
  term.clear()
  if x > w then x = 1
   elseif x < 1 then x = w
   elseif y > h then y = 2
   elseif y < 2 then y = h
  end
  if fruitCoord["isExists"] == true then
  fruitFunc = false
  else fruitFunc = true end
  fruit(fruitFunc)
  paintutils.drawPixel(x, y, colors.red)
  fruitCatch()
  score()
  sleep(gameSpeed)
  return x, y
end

fruitCoord = {}

function fruit(state)
  if state == true then
   fruitCoord["x"] = math.random(1, w)
   fruitCoord["y"] = math.random(2, h)
   fruitCoord["isExists"] = true
   end
   paintutils.drawPixel(fruitCoord["x"], fruitCoord["y"], colors.green)
end

function fruitCatch()
  if fruitCoord["x"] == x then
    if fruitCoord["y"] == y then
      counter = counter + 1
      fruitCoord["isExists"] = false
     end
   end
end

while true do
  parallel.waitForAny(flow, smb)
end