If you get 1 point...
Sometimes when we want a set of blocks is constantly repeated, instead of repeating the same blocks over and over again, you can use a repeat instruction allowing achieve the same effect, but more comfortable and manageable way. Consider a couple of examples:
when green flag clicked
say [I'm a dancer cat] for (2) secs
repeat (3)
move (10) steps
turn cw (15) degrees
wait (0.5) secs
turn ccw (15) degrees
move (-10) steps
wait (0.5) secs
end
when green flag clicked
forever
move (10) steps
if on edge, bounce
How these control blocks works?
In the block 'repeat' when execution reaches this point is repeated as often as has been indicated in the parameter block 'repeat', in the example would be 3 times, all blocks included within this block. We can see that the block 'repeat' has an arrow at the bottom indicating that when they finish executing the blocks back again up.
The block 'forever' works like the 'repeat' but never finish executing the blocks containing in its interior.