Emogrid

Emogrid produces a macros to be pasted into Slack to produce emoji grids.

Usage

emogrid [flags] <prefix> [x] [y]
Where x is the number of emojis in the line (default:  2)
      y is the number of lines              (default:  2)

Flags:  -start int
    	Start with this number (default 1)

For example, running:

emogrid topper 2 2

produces:

:topper-1::topper-2:
:topper-3::topper-4:

On a MacOS, it's easy to copy that directly into your clipboard:

emogrid topper | pbcopy

I'm sure that on Linux and Windows there's also a command like that, but I'll leave it for you to figure out.