How can i make the array in linear format up and down,right to left?

[nghia.code]

I want make gaming site like this what i do before.I make a 16 elements of array and one randomly word add into that array but i confused about the word selection i need to word selection of below site into one line.http://www.wordtwist.org/html5.php?u=d21d66fe3dcb2807b18d2b056c4d888a1365410413