Thanks for the help guys! that was what i needed. for reference in the future, here is the functional code to turn on a blue LED when the temp is under 70 degrees, and turn on a red LED when the temperature is over 70 degrees:
import org.openhab.core.library.types.*
import org.openhab.core.persistence.*
import org.openhab.model.script.actions.*
rule "LED Temp Display"
when
Item JAKETEMP received update
then
if(JAKETEMP.state as DecimalType > 70){
sendCommand(BlueLED, OFF);
sendCommand(RedLED, ON)
}
else
{
sendCommand(BlueLED, ON)
sendCommand(RedLED, OFF)
}
end