A scheduler for studying tractate Nazir

nazir_schedule.gs

function onEdit(e) {
  // Interact with Sheets App
  var app = SpreadsheetApp;
  // get current active sheet
  var activeSheet = app.getActiveSpreadsheet().getActiveSheet();
  // gets the amount of blatt in Nazir
  var blattInNazir = activeSheet.getRange("B2").getValue();
  // Log blattInNazir
  Logger.log("There are " + blattInNazir + " blatt in Nazir");
  
  // The gemara starts on daf 2
  var start = activeSheet.getRange("D2").getValue();
  var learnt = activeSheet.getRange("E2").getValue();
  // Ends on daf 66 (there are 65 blatt)
  var end = blattInNazir + 1;
  var todaysBlatt = start;
  var blattRow = 5 + learnt;
  
  var today = new Date().getTime();
  
  if(learnt !== 0){
  today = new Date(today + 86400000).getTime();
  }
     
  for(start; start <= end; start++){
    var todaysBlattCell = activeSheet.getRange(blattRow, 2);
    var dateCell = activeSheet.getRange(blattRow, 1);
    var theDate = new Date(today);
    var learntCell = activeSheet.getRange(blattRow,3).getValue();
    if(!learntCell){
      today = today + 86400000;
      todaysBlattCell.setValue("Nazir " + start);
      dateCell.setValue(theDate);
    }
    
    blattRow++;
  }
  
}