Marking and Redacting PDF

Hello everyone,

I  mark documents for redaction by using the drawing tool to place a rectangle around sensitive data. I then use javascript to place redaction boxes within the rectangles. However, I would like to apply the redactions without deleting the rectangles. Can you help me accomplish this task?

Additionally, I prefer to mark documents for redaction using brackets like these "[ ]" , or using a partiallty-completed square/rectangle (only the corners, or the top left and bottom right corner). Is there a drawing tool, or a javascript function that can produce such annotations? I hope to use these annotations instead of the rectangle. 

Here is the code I am using to find rectangle annotations and redact:

// Get the active document

var doc = event.target;

// Get all the rectangle shapes in the document

var rectangles = doc.getAnnots({type: "Rect"});

// Loop through each rectangle shape

for (var i = 0; i < rectangles.length; i++) {

    var rectangle = rectangles[i];

    // Get the rectangle's coordinates

    var rct = getAnnots(this.pageNum)[i].rect;

    var left = rct[0];

    var right = rct[2];

    var top = rct[3];

    var bot = rct[1];

    qd = [ [left, top, right, top, left, bot, right, bot] ];

    qd.toSource();

    // Create a new redaction annotation within the rectangle's bounds

    var redaction = this.addAnnot({

        type: "Redact",

        page: rectangle.page,

        quads: qd,

        repeat:true

    });

}

Thank you in advance for your help. Much Appreciated