How to add Filler gauge cpu/ram to dashboard?

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Hi I have this json in my splunk :

Serverip, serverRamUsage, TotalRAM, ServiceRAMUsage, serverCPUUsage, TotalCPU, ServiceCPUUsage

I want to add to my dashboard what is shown in the picture. But I'm not succeeding.

and also to show in percent which means taking the total cpu/ram and making it the 100%.

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