function onEdit(e) {
  var sheet = e.source.getActiveSheet();
  var range = e.range;

  if (range.getA1Notation() == "A13") {
    sheet.getRange("C12:I15").setValue("FALSE");
    sheet.getRange("A12:A13").setValue("FALSE");
  } else if (range.getA1Notation() == "A27") {
    sheet.getRange("C26:K29").setValue("FALSE");
    sheet.getRange("A26:A27").setValue("FALSE");
  }
}