GPIO automation question

switch.vent_fan_up_stairs
switch.ac_up_stairs
switch.heater_up_stairs

this are my switches for my HVAC… i only want one of them to turn on at the time that’s why i want to make an automation or maybe a scene to automate the problem can anyone point me to the write direction?

during automation or scene

switch.vent_fan_up_stairs ON
switch.ac_up_stairs OFF
switch.heater_up_stairs OFF

switch.vent_fan_up_stairs OFF
switch.ac_up_stairs ON
switch.heater_up_stairs OFF

switch.vent_fan_up_stairs OFF
switch.ac_up_stairs OFF
switch.heater_up_stairs ON