Expect Script: First ping the IP stored in hosts.txt file and if got response of ping run script

Question

for below code i want to check if the IP is up via ping and if ip is up run below code eles check next ip from hosts.txt

Edit 2: FYI ill be running script from windows machine

Edit 3:I managed to write incorporate a line,now with this script is pinging all the IP's mentioned in hosts.txt file but fails if any IP is down. What is required: I want script to go to the next IP if any IP is down.

#!/usr/bin/expect -f

#This Script will provide critical info which are required during troubleshooting

#Setting up Variables
set timeout 15                                                                                                                                 
set fid [open ./hosts.txt r]
set contents [read -nonewline $fid]
close $fid

#Grabbing Password to be used in script further
stty -echo
send_user -- "Enter the Password: "
expect_user -re "(.*)\n"
send_user "\n"
stty echo
set pass $expect_out(1,string)
foreach host [split $contents "\n"] {

    set timeout 5
    spawn ping $host
    expect  {
    "Reply" {puts "$host Is Up"}
    "Request" {puts "$host Is Down"}
        }