To create the mural 
To begin, you’ll need to colour code your template. Using the Miami collection from Post-it® Brand, the following is how we colour coded it:

Light grey – green
Dark grey – orange
Black – pink
Charcoal/Brownish – blue

Next, take a level to mark a straight line at where you will begin creating it. For this mural, we needed quite a large space. Since it is almost 50 pixels wide by 50 pixels high. When using the 1-7/8 Post-it® Notes equals approximately 9 feet wide x 9 feet high. And since a standard wall height is 8 feet high, we didn’t use the last few lines (height-wise). To work out how many Post-it® Notes you will need, simply multiply your grid (for example, ours is 50 x 48) which means we will need approximately 2,400 Post-it® Notes. And then each 1-7/8 pack (of 8) has 720 notes. You will also need to take into consideration how many colours for each, so although 2,400 notes is what we need, we needed to use more packages (approximately 25 pads in total which equals 4 packages – but then doubled to 8 packages to get all the colours needed).