Looking for a LibreOffice Calc Javascript Macro/Script

A. the Macro should be written in Javascript; B. the Macro should be run on LibreOffice Calc; C. The Macro should loop the follows Step 1 to Step 3 every 30 minutes Step 1. get the first empty cell in column C, the number of the first empty cell in column C is n(we will use this number n in step 3). For example, if C107 is not empty and C108 is empty, then C108 is the first empty cell in column C and n is 108; Step 2. Using function [login to view URL]() to get the second pet name to the first empty cell in column C from the following URL: [login to view URL] Explanation of the above URL: [login to view URL] Step 3. create a CSV file and named as "[login to view URL]", copy the contents of the following cells to the CSV file, and save the CSV file to the same folder of the LibreOffice Calc file. If the CSV file [login to view URL] existed in this folder, then replace it. A1, C1, D1 (copy to the first row of the CSV file "[login to view URL]") A(n-100), C(n-100), D(n-100) (copy to the second row of the CSV file "[login to view URL]") . . . . . . A(n-3), C(n-3), D(n-3) (copy to the 99th row of the CSV file "[login to view URL]") A(n-2), C(n-2), D(n-2) (copy to the 100th row of the CSV file "[login to view URL]") A(n-1), C(n-1), D(n-1) (copy to the 101th row of the CSV file "[login to view URL]") An, Cn, Dn (copy to the 102th row of the CSV file "[login to view URL]") which n is the number of the first empty cell in column C in step 1, (n-1) = n-1, (n-2) = n-2, ......, (n-100) = n-100