code

#!/bin/bash
{
 COUNTER=0
 LON=100
 LAT=200
jo type=FeatureCollection features[]=$(
         while [  $COUNTER -lt 10 ]; do
             echo The counter is $COUNTER
             let COUNTER=COUNTER+1
             json=$(jo type=Feature geometry=$(jo type=Point coordinates[]=$LON coordinates[]=$LAT) properties=$(jo name="Test"))
             LON=$LON+1
             LAT=$LAT+1
                echo "$json"
        done
)
} > 01test.txt