Should render a 2x2 grid

Should render a 2x2 grid with the first row having a height of 50px

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Should render a 2x2 grid with columns 50px and 50%

Should render a full-width 4x4 grid with:

• one large column on the left
• one large column on the right, being split in half vertically, with the number 2 in the top half, and numbers 3, 4, 5, and 6 in the bottom