Protecting rows depending on specific (today) date - variables

Question

I want to code my Google Sheets to check ("scan") active sheet to find a date that is "today" - and then, depending on the day, protect all columns in that row (row in witch it found todays date), so that only owner can change it (protect from everyone else).
With the help of the forum i found some "solutions", but cant get to make it work. I think there is a problem with for loop (just prediction).
Script should check for today date, read how many colmuns are active and lock the row(s) with today + all previous dates. I'm still missing the protection to lock all the rows with ownership rights only and ofcourse to work :)
var ss = SpreadsheetApp.getActiveSpreadsheet().getSheetByName('MY SHEET');
function lockRanges() {
var dateRange = ss.getRange(2, 1, ss.getLastRow()-2, 1);
var curDate = Utilities.formatDate(new Date(), "GMT+1", "dd/M/YYYY");
var val = dateRange.getDisplayValues();
var row;
var col;
var end = ss.getLastRow();
//Find last active column
for (var y = 0; y <= ss.getLastColumn(); y++) {
col = y + 1;
}
//Loop through all rows
for(var x = 0; x <= end; x++){
if(val[x][0]> curDate){
row = x;
break;
}
}
var protection = ss.getProtections(SpreadsheetApp.ProtectionType.RANGE)
if(protection.length > 0){
var range = ss.getRange(2, 1, row, col);
protection[0].setRange(range);
}
else{
ss.getRange(2, 1, row, col).protect();
}
}