How to make Status Indicator visualization display server name and change color based on count?

[Ashwini008]

Hi,

In place of count I want to show the server name, And change color based on condition if count is >250.

I referred many links and docs but could not achieve what I wanted 

index = webss
sourcetype = webphesst earliest= -1d latest=now
| where HTTP=500
| stats count by host
| eval color=if(count>=250, "#dc4e41", "#65a637"), icon=if(count>=250, "times-circle", "check-circle")