Chamber temperature glow

[chrborup]

Hi Guys

It would be nice if we had the possibility to make the neopixels glow with chamber temperature also.
I tried this code, but it does not work. What could be wrong?

[display_template led_chamber_temp_glow]
text:
{% if printer.chamber_heater.target > 0.0 %}
{% set temp = printer.chamber_heater.target %}
{% else %}
{% set temp = printer.configfile.config.chamber_heater.max_temp %}
{% endif %}
{% set ratio = printer.chamber_heater.temperature / temp|float %}
{ratio}, 0.0, {1-ratio}, 0.0