Horizontal Triple Pane Layout

Due to the fact that I prefer horizontal text panes more than vertical ones, I've used the "Horizontal Double Pane Layout" for quite some time. But today I needed more so I tried to create one and it worked out fine. Sadly for some unknown reason I cannot use super+alt+shift+3 on OSX so I used super+alt+3.

Here's the keymap code:
{
    "keys": ["super+alt+3"],
    "caption": "Horizontal Triple Pane Layout",
    "command": "set_layout",
    "args":
    {
        "cols": [0.0, 1.0],
        "rows": [0.0, 0.33, 0.66, 1.0],
        "cells": [[0, 0, 1, 1], [0, 1, 1, 2], [0, 2, 1, 3]]
    }
}