#!/bin/bash
function get_index(){
    for i in "${!xra_out[@]}"; do
        if [[ "${xra_out[$i]}" = "$value"  ]]; then
            echo "${i}";
            break
        fi
    done
}

xra_out=($(xrandr | grep ' connected' | awk '{print $1}'))
in=($@)
for i in `seq 0 2 ${#in[@]}`; do
    value="${in[$i]}"
    idx=$(get_index)
    if [ ! -z "$idx" ]; then
        screen_idx="$idx"
        #"${xra_out[$idx-1]}"
        paths[${screen_idx%:}]="--bg-scale ${in[$i+1]}"
    fi
done
#echo "${paths[@]}"
str=`printf -v var "%s\n" "${System[@]}"`
sh -c "feh ${paths[@]}"