Control Blocks

"Yellow Blocks" redirects here. For the light yellow blocks, see Events Blocks.

Control is one of the ten categories of Scratch blocks. They are color-coded amber, and are used to control scripts under certain conditions.

In Scratch 1.4 and earlier, this category also included the blocks that are now Events Blocks.

There are currently 11 Control blocks: 1 Hat block, 5 C blocks, 3 Stack blocks and 2 Cap blocks.

Blocks

Note:

Click on a block to learn more about it.

Scratch 3.0 has one Control Hat block:

• when I start as a clone

Scratch 3.0 has the following 3 Control Stack blocks:

• wait () seconds
• wait until <>
• create clone of ( v)

Scratch 3.0 has the following 5 Control C blocks:

• repeat ()
• forever
• if <> then

• if <> then
  else
  end

• repeat until <>

Scratch 3.0 has the following 2 Control Cap blocks:

• stop [ v]
• delete this clone

However, the stop [ v] block can become a stack block if the "other scripts in sprite" option is chosen.

Suggestions

Scratchers have suggested a Control block that repeats the blocks for a set amount of time:

repeat for () seconds {
} :: control loop

Obsolete Blocks

This article or section documents something not included in the current version of Scratch (3.0). It is only useful from a historical perspective.

The Forever If () block

Prior to Scratch 2.0, there was a "Forever If ()" block, which worked like "Forever, If () Then". It was removed for being overly confusing and can be replaced with a workaround:

forever
if <> then

See Also

• Event Blocks