cont()
function cont() {
  g_running=true;
  Hide('run'); Hide('cont'); Show('stop');
  one_step();
}
one_step()
function one_step() {
  if (g_running) {
    fd(); g_k++;
    if (g_k==g_numbers[g_j]) {
      g_j++; g_k=0; rt();
    }
    if (g_j==5) {
      g_i++; g_j=0
    }
    robot();
    if (g_i<4) {
      g_timer=setTimeout(one_step,200);
    } else {
      stop();
    }
  }
}