I'm a beginner, help to make a block

hello, sorry for my english, someone can help me to make a block for an account loop down from 33 to 0 with a button and a label but if the account is a 0 for the first time the button displays a text and return the account to 33 and if it arrives to 0 for the 2nd time it shows me another text on the button and return the account to 33 also.
thanks

Its a kodular now and i don"t understand your question

A very good way to learn App Inventor is to read the free Inventor’s Manual here in the AI2 free online eBook App Inventor 2 Book: Create Your Own Android Apps … the links are at the bottom of the Web page. The book ‘teaches’ users how to program with AI2 blocks.
There is a free programming course here Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps
How to do a lot of basic things with App Inventor are described here: How do you...? .

Also do the tutorials Tutorials for App Inventor | Explore MIT App Inventor to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor

Taifun

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