From Test-Scratch-Wiki
The Stop Sign is a button that when clicked stops the running project immediately. It can be clicked at any time during a project.
The Stop All block is related to the stop sign (hence the use of the stop sign image); once the block has been reached in a script, the project will end unless it is started again manually, by the clicking of the Flag, the clicking of a sprite, or a When () Key Pressed block.
How the buttons appear in Scratch 2.0.
The stop sign in Scratch 1.4.
How the buttons appear in Scratch 1.3.
This is the stop sign as it appeared in the Java Player, circled.
This is how the stop all block used to relate to the stop sign. The block currently appears the same, but without the red stop sign.
Some people mistakenly call it the Red Flag.[1]
Location
The stop sign appears online and offline, as does the flag. It appears on the right of the flag in both places.
In Scratch 2.0
Although the Stop all block has been replaced with Stop (), the icon is still programmed into Scratch 2.0. In older versions of Scratch 2.0, it could be placed in custom blocks by typing the text "@stop".
A similar trick could be done to insert the green flag icon by typing @greenFlag.
References
- ↑ http://scratchforums.blob8108.net/forums/viewtopic.php?id=57153 Look in "Fixed Glitches", number 10
