How to stop a for loop from pausing after running a function?

Code:

canrun = true
for i = 0, .4, .01 do --move door
    local cframe = target.Parent.PrimaryPart.CFrame:lerp(destinationCFrame, i)
    target.Parent:SetPrimaryPartCFrame(cframe)
    if canrun then
        if i >= .15 then
            canrun = false
            closeHandle(target) --FUNCTION
        end
    end
    wait()
end -- end move

Here, I have a for loop that's supposed to move a door, using lerp. The door moving script runs fine without the function (labeled above in code). But when adding the function, the for loop pauses until the function is complete. This creates a pause of the door swinging open, as it pauses during its movement. All I need is to get the closeHandle() function to run if (i >= .15), without it pausing the for loop.