List Instances

if [ -z "$1" ]
then
  region_list=($(aws ec2 describe-regions --query 'Regions[].RegionName[]' --output text | gsed -e 'y/\t/\n/' | gsed '1!G;h;$!d'))
else
  region_list=$1
fi


clear
for i in "${region_list[@]}"
do
     echo "Checking $i..."
#    aws ec2 describe-instances --query 'Reservations[*].Instances[*].[InstanceId,LaunchTime,InstanceType,Tags[?Key==`Name`].Value,State.Name]' --output text --region $i
#    echo "---------"
#    echo ""
     aws ec2 describe-instances --query 'Reservations[].Instances[].[{Name:Tags[?Key==`Name`] | [0].Value, ID:InstanceId, AZ:Placement.AvailabilityZone, Status:State.Name, Type:    InstanceType, PublicIP:NetworkInterfaces[].Association[] | [0].PublicIp}]' --output table --region $i
done