Copy conditional formatting rule to all the Google sheet

copyMyConditionalFormatting.gs

/** @OnlyCurrentDoc */

function copyMyConditionalFormatting() {
	var spreadsheet = SpreadsheetApp.getActive();
	var base_range = spreadsheet.getRange("B2:X2");		//Starting range
	var conditionalFormatRules = spreadsheet.getActiveSheet().getConditionalFormatRules();
	for (var i=1; i<=1001-3; i++){						//Which columns
		var new_rule = conditionalFormatRules[0].copy	//Copy first rule to all sheet
			.setRanges([base_range.offset(i, 0)])		//column offset
			.build();
		conditionalFormatRules.push(new_rule);
	}
	spreadsheet.getActiveSheet().setConditionalFormatRules(conditionalFormatRules);
};