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Experimental blocks were blocks that did not work well, and as such were not shown to the public. They were available from 1.0 through 1.2. In 1.0, they were accessed by shift-clicking the Extras menu and choosing "show experimental blocks"; in 1.1 and 1.2, through Shift-Click-R. It is similar to the Motor Blocks, which must be manually shown, but the Motor blocks work well.

Sound Blocks

The 13 experimental Sound blocks.

There were 13 experimental Sound Blocks. All were Stack-shaped. They were:

  • Start movie
  • Stop movie
  • Change seconds by ()
  • Set seconds to ()
  • Change zoom by ()
  • Set zoom to ()%
  • Change horiz. pan by ()
  • Set horiz. pan to ()
  • Change vert. pan by ()
  • Set vert. pan to ()
  • Change fade by ()
  • Set fade to ()%
  • Set fade color to []

The fade blocks were later changed to say "trans." (short for "transparent").

These blocks were likely for use with the Scratch MoviePlayerMorph.

Sensing Blocks

The 10 experimental Sensing blocks.

There were 10 experimental Sensing Blocks. 7 were Reporter Blocks, and 3 were Stacks. They were:

  • Camera motion
  • Camera direction
  • Camera relative x
  • Camera relative y
  • Camera absolute x
  • Camera absolute y
The readouts of the reporter blocks, all showing "a ScratchSpriteMorph()".
  • Track motion
  • Track color
  • Auto calibrate red

These blocks seem to be for camera sensing. They did not work so well, as all the reporters simply showed "a ScratchSpriteMorph()". Camera support will be added in Scratch 2.0.

Comment Block

The comment block from 1.2 beta.

The comment block from 1.2 beta can also be considered experimental, though it was not hidden and shown. This block did not make the final 1.2 release, as it confused many users. In 1.3, modern comments were added.