I believe the semi colon is automatic so the scratch team didn't do anything really.

Gamer_Logan819 wrote:

jvvg wrote:

In the past they have done something every year (some years it was pretty simple things while other years it was very elaborate), but this year the development team seems to be stretched pretty thin, so they weren't able to add any new features this year. The moderation is also stretched kinda thin as far as I'm aware, so they weren't able to put extra moderation resources towards any special April Fools' Day stuff.

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As Maximouse has said in a recent thread it requires a single variable to be changed. I’m sure changing one variable would be a large investment risk, especially for a company such as the Scratch Foundation. The amount of money and time required to accomplish such a feat would be rather large because of the given task’s challenging nature.
To be fair maximouse has also said today that a new cat block for high contrast would have to be created and overall high contrast makes the implementation of cat blocks more tricky.