Dashboard design timechart

[sphiwee]

index="intau" host="server1" sourcetype="services_status.out.log" service="HTTP/1.1" status=* | chart count by status
| eventstats sum(count) as total
| eval percent=100*count/total
| eval percent=round(percent,2)
| eval SLO =if( status="200","99,9%","0,1%")
| where NOT (date_wday=="saturday" AND date_hour >= 8 AND date_hour < 11)
| fields - total count

I have the above Query and the above result , how can i combine 502 and 200 results to show our availability excluding maintenance time of 8pm to 10pm every Saturday, how can i make it look like the drawing I produced there

[ITWhisperer]

index="intau" host="server1" sourcetype="services_status.out.log" service="HTTP/1.1" status=* 
| eval status=if(status=502,200,status)
| chart count by status