Orbit around object, direction

local function Main()
    local rect
    local radius = 20   --Orbit distance of "center"
    local angle = 90    --Starting angle

    local orbitx = 125;
    local orbity = 125;

    local direction = false;        --True or false, postive or negative
    local function Orbit(event)
        rect.x = orbitx  + math.cos(math.rad(angle)) * radius
        rect.y = orbity  + math.sin(math.rad(angle)) * radius
        if(direction == false)then
            angle = angle + 3
        else
            angle = angle - 3;
        end
    end

    rect = display.newRect(0,0,50,50)
    rect:setReferencePoint(display.BottomLeftReferencePoint)
    local prevX = nil;
    local prevY = nil;
    function rect:touch(event)
        local p = event.phase;
        if(p ~= nil)then
            if(p == "began")then
                prevX = event.x;
                prevY = event.y;
            elseif(p == "moved")then
                if(event.x > prevX and event.y > prevY)then
                    direction = false;
                else
                    direction = true;
                end

                Orbit(event);
            end
        end
    end
    rect:addEventListener("touch", rect);
end