Time driven trigger not firing [closed]

First time using Google Apps Script. And I am trying to clear a range of cells in one tab of my spreadsheet every day at the same time.

I can push it through manually in the script editor but the trigger never works.

/** @OnlyCurrentDoc */function ClearDataByTimeDrivenTrigger() {  var spreadsheet = SpreadsheetApp.getActive();  var range = spreadsheet.getRange('G1:G10');  range.clear({contentsOnly: true, skipFilteredRows: true});  var spreadsheet = SpreadsheetApp.getActive();  var range = spreadsheet.getRange('G30:G60');  range.clear({contentsOnly: true, skipFilteredRows: true});};