Can you make a script for select cells?

Hi everyone

I want to use script to select cells

If I selected a cell or slected a character in the cell or the cursor in the one cell

I want to script count the cursor position as a first column then select all the right hand side of cells:

for example:

I selected a cell like this:

then I want to select the cells like this:

and 2nd script for select all cells

thanks

John