I have been trying to make a script to calculate this but keep getting lost in the code. I have a grid 15 by 15 going from 0 - 14, then the next row 15 - 29 and so on till 225. It's so i can set up a depth system on the grid where by 14 is the very back and 210 is the very front. I ended up writing the code manually but would prefer the script to calculate this for me. Here is the code i wrote can someone make a script to do this please (or give me some help).

setChildIndex(MovieData[14],0);

setChildIndex(MovieData[13],1);
setChildIndex(MovieData[29],2);
setChildIndex(MovieData[28],3);

setChildIndex(MovieData[12],4);
setChildIndex(MovieData[27],5);
setChildIndex(MovieData[44],6);
setChildIndex(MovieData[43],7);
setChildIndex(MovieData[42],8);

setChildIndex(MovieData[11],9);
setChildIndex(MovieData[26],10);
setChildIndex(MovieData[41],11);
setChildIndex(MovieData[59],12);
setChildIndex(MovieData[58],13);
setChildIndex(MovieData[57],14);
setChildIndex(MovieData[56],15);

setChildIndex(MovieData[10],16);
setChildIndex(MovieData[25],17);
setChildIndex(MovieData[40],18);
setChildIndex(MovieData[55],19);
setChildIndex(MovieData[74],20);
setChildIndex(MovieData[73],21);
setChildIndex(MovieData[72],22);
setChildIndex(MovieData[71],23);
setChildIndex(MovieData[70],24);

and so on till the top number (14,13,12,11,10) equals -1

Thank you to anyone that can help