Can you use a flashlight and morse code to summon aliens and why?

No, you cannot use a flashlight and Morse code to summon aliens because there is no evidence that aliens are able to understand Morse code or detect light signals from Earth. Additionally, the distances between Earth and other planets or stars is so vast that even if aliens were able to detect light signals from Earth, the signal would take a long time to reach them and they would not be able to respond in a timely manner. Furthermore, even if aliens were able to detect and respond to light signals from Earth, it is unlikely that they would be able to interpret the Morse code as it is a human-made code that is not used by any other species. Therefore, it is highly unlikely that a flashlight and Morse code could be used to summon aliens.