Click the green flag to start the project. Then shift-click the green flag to turn on/off Turbo Mode.
⚡⚡⚡ Notes ⚡⚡⚡ There is also an 10 block version that uses "days since 2000" instead of the timer: https://scratch.mit.edu/projects/766914189/ I have reverted to switching the costume instead of setting a variable because it is more stable, presumably because switching to a costume takes longer than setting a variable. I have added an explanation of how it works inside. For a more through explanation, check out @RokCoder's excellent article: https://rokcoder.com/tips/inner-workings.html ⚡⚡⚡ Credits ⚡⚡⚡ This was a collaborative effort. My original version had 12 blocks, but then @codeGIO3 made this 8 block remix: https://scratch.mit.edu/projects/766447882/ This inspired me to change the code drastically, and I shaved off another block. Then @donotforgetmycode made a 6 blocks remix: https://scratch.mit.edu/projects/766523542/ I changed my code accordingly.