Write a script that prompts the user for a correct pass code or 0 to exit the program. The script then checks the entered number, if it is zero, it ends the program with a 'Goodbye!' message. If the entered number is not zero, the script compares it with the number 4444 (the correct pass Code). If the number is correct, the script displays a 'Welcome!' message and exits the program, otherwise, it repeats the same message until the user enters either 0 or 4444.

Answer notification;

Well, this code would box the whole body of an html document. by using the relative value for position, you are telling it to position relative to its normal position, which the top left corner is at (0,0). by using left: 50px, you are telling the box to set the left margin  edge to 50px and by using top: 50px, you are telling it to set the top margin edge to 50px. by doing this shifting, the top left corner of the box, which is at (0,0) would be positioned at (50,50)

"computer screen desktop"? what? that phrase makes no sense, and it has nothing to do with modifying system components i assure you.