API:
api.blockchain.info and https://api.blockchain.info/charts/transactions-per-second?timespan=5weeks&rollingAverage=8hours&format=json
twig-template:
{%for v in values %}
{{v.x}}-{{v.y}} <br>
{% endfor %}
In Action:
curlGET failed: Operation timed out after 5000 milliseconds with 0 bytes received