Home Assistant Mushroom card templates

templates.yaml

#Showing the state of a temperature in a template card:
{{ states('sensor.your_temperature_sensor') }}

#Change the colour of the light depending on status:
{% if is_state('light.your_light', 'on') %}
  orange
{% endif %}

#Welcome template:
{% set time = now().hour %}
{% if (time >= 18) %}
  Good Evening, {{user}}!
{% elif (time >= 12) %}
  Good Afternoon, {{user}}!
{% elif (time >= 5) %}
  Good Morning, {{user}}!
{% else %}
  Hello, {{user}}!
{% endif %}
  

Many thanks @danewhitfield for your assistance! You rock! :-)