The Scratchsphere is a new extension and can be connected to scratch.The Scratchsphere has a bunch of buttons.
Here are the blocks for this extension:

If [Button 1  v] pressed then

When [Button 1  v] pressed and <> then

If [Button 1  v] not pressed then

This is very and awesome.The best extension ever .THIS IS EPIC XD

Isn't that the equivalent of:

if <key [ v] pressed?> then
    
end

forever
    
if <<key [ v] pressed?> and < >> then
    
end

end

if <not <key [ v] pressed?>> then
    
end