launch.sh Syntax Error

I'm using the smartrestart plugin and I'm getting a syntax error whenever I bash my launch.sh. Here's the error and the sh pste.

launch.sh: line 17: syntax error near unexpected token `done'
++++++++++++++++++
#!/bin/sh
BINDIR=$(dirname "$(readlink -fn "$0")")
cd "$BINDIR"
while true; do
echo "run server now , you can't close"
screen -S 0 java -Xmx500M -Xms500M -jar spigot.jar nogui
echo "Restart after 5 seconds , you can close now"
sleep 1
echo "Restart after 4 seconds , you can close now"
sleep 1
echo "Restart after 3 seconds , you can close now"
sleep 1
echo "Restart after 2 seconds , you can close now"
sleep 1
echo "Restart after 1 seconds , you can close now"
sleep 1
done