Led matrix randomly flashing

Controller: Eiechip Mega2560 Rev3 ATMEGS2560-16AU CH340G Development Board
Led matrix: Keyestudio LED Matrix (8x16)
Websites: Matrix Maker Led Matrix Website Other Led Matrix Website

Hi, I used the matrix maker and the other websites to do the code.
I made a little heartbeat animation but at the end it flickers.
Any help?

Edit: I solved the problem, its in the loop near the end where it says:

if(data_line >= 2)
      {
        data_line = 0;
      }

Replace 2 with the amount 'frames' of your animation

sketch_mar26b.ino (3.22 KB)

You need to go and read the forum instructions so that you can go back and modify your original post (not re-post it) - using the "More -> Modify" option below the right hand corner of your post - to mark up your code as such using the "</>" icon in the posting window. Just highlight each section of code (or output if you later need to post that) from the IDE and click the icon.

In fact, the IDE itself has a "copy for forum" link to put these markings on a highlighted block for you so you then just paste it here in a posting window. But even before doing that, don't forget to use the "Auto-Format" (Ctrl-T) option first to make it easy to read. If you do not post it as "code" it can easily be quite garbled and is generally more difficult to read due to the font.

It is inappropriate to attach it as a ".ino" file unless it is clearly too long to include in the post proper; yours is not. People can usually see the mistakes directly and do not want to have to actually load it in their own IDE. And even that would also assume they are using a PC and have the IDE running on that PC.

Also tidy up your blank space. Do use blank lines, but only single blanks between complete functional blocks.

Why do we think this is more important than just having your question answered? Because it is really difficult to write code properly - as with any other task requiring care - if everything is not well organised!

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