function _init()
    --put this stuff inside _init()
    px=64
 py=64
 ps=18
 solidt=false
end

function _update()
    cls()
    --put hero here
    --no longer need to call solid
    --because of changes elsewhere
    hero()
    cam()
end

function _draw()
    bg()
    debug()
    --moved the spr call out of hero()
    --draw sprite so that px,py are
    --in the center of sprite.
    --this makes it easier to see the collisions
    --especially since px and py
    --are at 0,0 within the sprite
    --which is transparent (black) in your sprite
    spr(ps,px-4,py-4)
end

-- custom functions 

function bg()
    rectfill (1,1,120,120,3)
    map(0,0,0)
end

function cam()
    if (px>64) then
        camera((px-64),y)
    end
    if (py>64) then
        camera (x,(py-64))
    end

    if (px>64) and (py>64) then
        camera (px-64,py-64)
    end
end

function debug()
    --print player (x,y)
    print ("pixel x:"..px,1,1,7)
    print ("pixel y:"..py,1,10,7)

    --print tile (x,y)
    print("tile x:"..((px - (px%8))/8),1,110,7)
    print("tile y:"..((py - (py%8))/8),1,120,7)

    print (solidt, 1, 80,8)

end

function hero()
--moved spr call
--this is where it was drawing

    --[[button numbers
            btn 0 = <
            btn 1 = >
            btn 2 = ^
            btn 3 = v
            btn 4 = z   ]]

    if btn(0) then --left
        --new function finds tx for pixel to left of px
        pixtotile(px-1,py)
        if not fget(mget(tx,ty),0) then
            if px>(-1) then
                px -=1          
                ps=17
            end
        end
    end

    if btn(1) then --right
        --finds tx for one pixel to the right
        pixtotile(px+1,py)
        if not fget(mget(tx,ty),0) then
            if px<992 then   
                px +=1          
                ps=19
            end
        end 
    end

    if btn(2) then --up
        --finds ty for one pixel up
        pixtotile(px,py-1)
        if not fget(mget(tx,ty),0) then
            py -=1
            ps=2
        end
end

    if btn(3) then --down
        --finds ty for one pixel down
    pixtotile(px,py+1)
        if not fget(mget(tx,ty),0) then
             py +=1
             ps=34
        end  
    end

end

function solid(x,y)
    --made a new function out of what
    --was here and call that function
    pixtotile(px,py)

    if fget(mget(tx,ty),0) then --getting map tile to get tile flag
        solidt= true
    else
        solidt= false
    end

end

function pixtotile(x,y)
    --made this function
    --because this code is useful
    --in multiple spots
    --and you don't always need
    --the rest of solid every time.
    tx = ((x-(x%8))/8) --getting yile x,y instead of pixel
    ty = ((y-(y%8))/8)
end
--end hero stuff

--end game