How to Loop Over a Variable In Integration Builder (assets)

LoopTest.json

{"id":27126,"name":"LoopTest","userId":21107,"accountId":18281,"createdDate":"2019-06-20T18:58:43Z","steps":[{"id":177630,"onSuccess":["looper"],"onFailure":[],"name":"consoleLog3","type":"script","properties":{"body":"console.log(steps.getSFDCAccounts.response.body);\n\n// config.list = ['1','2','3'];\n\nconfig.list = steps.getSFDCAccounts.response.body;"}},{"id":177635,"onSuccess":["looper"],"onFailure":[],"name":"consoleLogEntry","type":"script","properties":{"body":"console.log(steps.looper.entry);"}},{"id":177629,"onSuccess":[],"onFailure":[],"name":"consoleLogExit","type":"script","properties":{"body":"console.log('Done');"}},{"id":177628,"onSuccess":["consoleLogEntry"],"onFailure":[],"name":"consoleLogIndex","type":"script","properties":{"body":"console.log(steps.looper.index);"}},{"id":177624,"onSuccess":["looper"],"onFailure":[],"name":"getSFDCAccounts","type":"elementRequest","properties":{"elementInstanceId":"${config.sfdc}","method":"GET","api":"/accounts"}},{"id":177627,"onSuccess":["consoleLogIndex"],"onFailure":["consoleLogExit"],"name":"looper","type":"loop","properties":{"list":"${steps.getSFDCAccounts.response.body}"}}],"triggers":[{"id":24103,"onSuccess":["getSFDCAccounts"],"onFailure":[],"type":"event","async":true,"name":"trigger","properties":{"elementInstanceId":"${config.sfdc}"}}],"engine":"v3","active":true,"singleThreaded":false,"debugLoggingEnabled":true,"configuration":[{"id":48100,"key":"sfdc","name":"sfdc","type":"elementInstance","required":true}]}