It's very easy, just do these steps ...
First, make a new block.
Second, make your block look like the block you want.
Then, you have to drag the execute block, call block and the Javascript Function block.
Lastly, you have to write '' return a ''
And Tada! .
Now you do have your own return block.
there is no need to use javascript. Just use the primitive report block
I agree with ego-lay_atman-bay, just use the primitive report, and why is your post and block in English, but the Snap environment is [?]Spanish[/?]
Does this have any benefit over the built in report block? You can just use the one that Snap! provides right?