How to present rules in RDF or OWL

Hi, there, I'm a green hand in semantic technology , I want to use RDF or OWL to describe the following rules:

#----example1:
    if trafficLight == "red" or "turnOff"   then
           barrierStatus = "down"
    else           # trafficLight == green
           barrierStatus = "up"

#----example2:
     statementA        {Bob  hasDisease  diabetes}
     if  bloodGlucose >14   then
            statementA.certainty >0.8
     else
            statementA.certainty <=0.8

Would anyone please show me how to do this in RDF or OWL? (better not in shacl or sparql).
Thank you very much for any information or suggestion.

Best,
Joylix