Scratch

Hᴇʟʟᴏ, Sᴄʀᴀᴛᴄʜᴇʀs! I ᴡᴏᴜʟᴅ ʟɪᴋᴇ ᴛᴏ ᴛᴇʟʟ ʏᴏᴜ ᴀʙᴏᴜᴛ ᴀ ᴘʀᴏᴊᴇᴄᴛ ᴛʜᴀᴛ I ᴍᴀᴅᴇ ᴄᴀʟʟᴇᴅ "Tʜᴇ Sɪɴɢɪɴɢ Pɪᴇ"! Iᴛ ᴄᴏɴᴛᴀɪɴs ᴀ sᴍɪʟɪɴɢ ᴘɪᴇ ᴛʜᴀᴛ sɪɴɢs ᴀ ʀᴀɴᴅᴏᴍ sᴏɴɢ! Aʟsᴏ, ɪғ ʏᴏᴜ ᴅᴏᴡɴʟᴏᴀᴅ ɪᴛ, ᴀɴᴅ ᴛʜᴇɴ ʏᴏᴜ ᴄʟɪᴄᴋ ᴛʜᴇ "Sᴛᴏᴘ Aʟʟ" sɪɢɴ, ᴛʜᴇʀᴇ ᴡɪʟʟ ʙᴇ ᴀ ᴍᴇssᴀɢᴇ. Fɪɴᴅ ᴏᴜᴛ ᴛʜᴇ ᴍᴇssᴀɢᴇ ʙʏ ᴅᴏᴡɴʟᴏᴀᴅɪɴɢ ᴛʜᴇ ᴘʀᴏᴊᴇᴄᴛ!

Here's the link:
The singing pie!

If you would like to know how to make a sprite show when you click the "Stop All" sign, then read these Scratch Blocks:

when gf clicked
set [ghost] effect to (100)

This makes the sprite that you want to show when you click the green flag hide, but when you click the stop sign, it closes the effect of hiding by setting the ghost effect to 0. Now you should know how to make a sprite hide when you click the "Stop All" sign!


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