Google Apps Scripts send 2 form input to 2 difference column but in same Row

Hello there actually im new using this Apps scripts and trying to build something that can be achieve with spreadsheet. The problem is when i submit new data to a second form the output is below the new data.,

here the code:
Code.gs

function processForm(input1, input2, input3) {
  var sheet = SpreadsheetApp.getActiveSheet();
  var range = sheet.getRange("B4:D4");
  range.setValues([[input1, input2, input3]]);
  var values = range.getValues();
  var lastRow = sheet.getLastRow();
  var nextRow = lastRow + 1;
  sheet.insertRowAfter(lastRow);
  sheet.getRange(nextRow, range.getColumn(), 1, 3).setValues([[input1, input2, input3]]);
  return true;
}
function processForm1(input4, input5, input6) {
  var sheet = SpreadsheetApp.getActiveSheet();
  var range = sheet.getRange("G4:I4");
  range.setValues([[input4, input5, input6]]);
  var values = range.getValues();
  var lastRow = sheet.getLastRow();
  var nextRow = lastRow + 1;
  sheet.insertRowAfter(lastRow);
  sheet.getRange(nextRow, 7, 1, 3).setValues([[input4, input5, input6]]);
  return true;
}

i have try many option but still cant figure it out.,
the row is still follow the lastrow of processform.

refer the image what im trying to achieve

How about modifying your script using this sample script?

Modified script:

// Ref: https://stackoverflow.com/a/44563639
Object.prototype.get1stNonEmptyRowFromBottom = function (columnNumber, offsetRow = 1) {
  const search = this.getRange(offsetRow, columnNumber, this.getMaxRows()).createTextFinder(".").useRegularExpression(true).findPrevious();
  return search ? search.getRow() : offsetRow;
};

function processForm(input1, input2, input3) {
  var sheet = SpreadsheetApp.getActiveSheet();
  var row = sheet.get1stNonEmptyRowFromBottom(2) + 1; // Last row of column "B".
  // sheet.insertRowAfter(row); // If you want to use this line, please enable this.
  sheet.getRange(row, 2, 1, 3).setValues([[input1, input2, input3]]);
  return true;
}

function processForm1(input4, input5, input6) {
  var sheet = SpreadsheetApp.getActiveSheet();
  var row = sheet.get1stNonEmptyRowFromBottom(7) + 1; // Last row of column "G".
  // sheet.insertRowAfter(row); // If you want to use this line, please enable this.
  sheet.getRange(row, 7, 1, 3).setValues([[input4, input5, input6]]);
  return true;
}

• By this modification, at processForm, the values are put to the next row of the last row of column "B". At processForm1, the values are put to the next row of the last row of column "G".

Reference:

• Related thread.
  • https://stackoverflow.com/q/17632165