The Invader Clones appear one by one on the screen at 1/30 second intervals when created in a repeat loop. Explanation ---------------- Scratch yields execution each time it reaches the end of the repeat loop that creates the Invader Clones. The "when I start as a clone" script is then run for the latest clone created. This script shows the Invader Clone so Scratch must update the screen. Scratch waits until 1/30th second has elapsed since the last screen update. (Scratch runs at 30 FPS). So the Invader Clones appear on the screen at 1/30 second intervals which is a very nice effect! Toshihiro Nishikado of Japan wrote Space Invaders for Taito in 1978. Japan had to mint extra 100 Yen coins solely because of the demand for the coins for the game. Space Invaders became an international hit and was hugely responsible for popularizing arcade games.
This tutorial discusses How Scratch Projects Run: https://scratch.mit.edu/discuss/post/3680398/ and then a Space Invaders project and fixes: https://scratch.mit.edu/discuss/post/3680412/ Toshihiro Nishikado of Japan wrote Space Invaders for Taito in 1978. Japan had to mint extra 100 Yen coins solely because of the demand for the coins for the game. Space Invaders became an international hit and was hugely responsible for popularizing arcade games.
