Script to Move Range Showing No Error but Not Executing - google-apps-script

Question

Learning scripts by trial and error. Please forgive probable ignorance in the question. I want a script to move a specific range (but not the whole row) in the active sheet to be positioned above another range in the active sheet. I want this move to take place upon edit and only when the text in column H is "C". The script I have so far runs with no errors but does not affect any change. Additionally, I would like this same thing to happen not only for row 4 but for rows 4-18. I was simply going to copy successful lines multiple times and update range for each, but I am sure there is a better way?
function onEdit(event) {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = SpreadsheetApp.getActiveSheet();
var range = sheet.getActiveCell();
var rangetoWatch = ("F4:I4");
var columnNumberToWatch = 8;
var valueToWatch = "C";
if (sheet.getName() == sheet && sheet.getRange() == range.getColumn() == columnNumberToWatch && rangetoWatch.getValue() == valueToWatch) {
sheet.getRange("F20:I").moveTo(sheet.getRange("F21"));
sheet.getRange("F4:I4").moveTo(sheet.getRange("F20:I20"));
}
}

Answer 1

in case anyone stumbles across this thread in the future... i finally figured out what I was trying to accomplish. a sample script is below.
function movedown(){
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = SpreadsheetApp.getActiveSheet();
var range = sheet.getActiveCell();
var row = range.getRow();
var mini = sheet.getRange(row, 1, 1, 3);
var columnNumberToWatch = 3;
var valueToWatch = "C";
if (range.getColumn() == columnNumberToWatch && range.getValue() == valueToWatch) {
sheet.getRange("A15:C").moveTo(sheet.getRange("A16"));
sheet.getRange(row, 1, 1, 3).copyTo(sheet.getRange("A15:C15"));
sheet.getRange(row, 1, 1, 3).clear({contentsOnly:true});
}
}

Answer 2

I think this is what you want. But I did not find your explanation to be very clear.
function onEdit(e) {
var sheet=e.range.getSheet();
//next line not required if you want it to happen on all sheets
if(sheet.getName()!='SomeSheetName'){return;}//keep the process from only happening on one sheet
if(e.range.rowStart>=4 && e.range.rowStart<=18 && e.range.columnStart==8 && e.value=='C') {
sheet.getRange(20,6,sheet.getLastRow(),4).moveTo(sheet.getRange(21,6));
sheet.getRange(e.range.rowStart,6,1,4).moveTo(sheet.getRange(20,6,1,4));
}
}