I need the macro to apply only to a range of cells

Question

I need the macro to take as reference var targetRange =targetSheet.getRange(targetSheet.getLastRow()+1,1); but only from a range of cells, from 1 to 7. because I need to write in front of the data that the macro brings to me when using getLastRow()+1 it takes everything I write in the sheet and continues copying the same information.

i like app script but i need more assistance

Answer 1

	A	B	C	D	E	F	G	H	I	J
1	COL1	COL2	COL3	COL4	COL5	COL6	COL7	COL8	COL9	COL10
2	1	8	1	1	5	2	3	0	0	1
3	10	9	8	2	3	6	5	7	3	6
4	9	8	8	2	8	1	4	4	9	8

function getvaluesfromARangeofCells() {
  const ss = SpreadsheetApp.getActive();
  const sh = ss.getSheetByName("Sheet1");
  const [[a1,,,,,,,,,],[,b2,,,,,,,,],[,,c3,,,,,,],[,,,d4,,,,,]] = sh.getDataRange().getValues();
  Logger.log("a1: %s, b2:%s, c3:%s, d4: %s",a1,b2,c3,d4);
}

xecution log
5:06:07 PM  Notice  Execution started
5:05:58 PM  Info    a1: COL1, b2:8.0, c3:8.0, d4: 2.0
5:06:10 PM  Notice  Execution completed