VBA - Concatenate columns with delimiter

[Sinsation]

Hello everybody!

I have a question for a VBA code, and as a complete beginner in the world of VBA, I have no idea where to start.

My goal is to concatenate some columns, the number will vary, with the delimiter " > " - no quotes, in the first cell of the row.
I will be doing this for an unknown number of rows down, often several hundreds or thousands.

Below are two pictures of the idea, the first showing the concept. I have a set of columns, and these need to be combined in the first cell of each row, in this case the empty A-rows.

1.JPG

The result should be like this, with all columns combined, separated by the delimiter >.
2.JPG

Hope somebody can help