-- load the API
os.loadAPI("ocs/apis/sensor")
-- wrap the sensor
prox = sensor.wrap("left")
-- get the targets
local targets = prox.getTargets()
-- loop through them
for name, basicDetails in pairs(targets) do
  -- print their name
  print("Found entity: "..name)
  -- get more details about them
  local moreDetails = prox.getTargetDetails(name)
  -- print their health
  print("Health: "..moreDetails.Health)
  print("------")
end