diff --git a/main.go b/main.go
index 72653be..2604104 100644
--- a/main.go
+++ b/main.go
@@ -1,63 +1,70 @@
 package main
 
-// veja:
-// The relationship between chaos, fractal and physics
-// https://www.youtube.com/watch?v=C5Jkgvw-Z6E
-
 import (
 	// "fmt"
 	"fmt"
 	"math"
 	"math/rand"
 	"strconv"
-
-	// "math/rand"
-
 	rl "github.com/gen2brain/raylib-go/raylib"
 )
 
 
 type quadnode struct {
-    topleft, bottomright rl.Vector2
+    // pos, size rl.Vector2
+    pos, size rl.Vector2
     magnet *magnet
     parent *quadnode
     nodes []*quadnode
+    debug string
 }
 
 func newQuadTree() *quadnode {
     return &quadnode{
-        topleft: rl.NewVector2(0, 0),
-        bottomright: rl.NewVector2(windowWidth, windowHeight),
+        pos: rl.NewVector2(0, 0),
+        size: rl.NewVector2(windowWidth, windowHeight),
         nodes: nil,
+        debug: "root",
     }
 }
 
 func (q *quadnode) subdivide() {
-    halfX := q.bottomright.X/2 
-    halfY := q.bottomright.X/2 
+    halfX := q.size.X/2 
+    halfY := q.size.Y/2 
+    halfSize := rl.NewVector2(halfX, halfY)
 
     q.nodes = []*quadnode{
         {
-            topleft: q.topleft,
-            bottomright: rl.Vector2{X: halfX, Y: halfY},
+            pos: q.pos,
+            size: halfSize,
             parent: q,
+            debug: "0",
         },
         {
-            topleft: rl.Vector2{X: halfX, Y: q.topleft.Y},
-            bottomright: rl.Vector2{X: q.bottomright.X, Y: halfY},
+            pos: rl.NewVector2(q.pos.X + halfX, q.pos.Y),
+            size: halfSize,
             parent: q,
+            debug: "1",
         },
         {
-            topleft: rl.Vector2{X: q.topleft.X, Y: halfY},
-            bottomright: rl.Vector2{X: halfX, Y: q.bottomright.Y},
+            pos: rl.NewVector2(q.pos.X, q.pos.Y + halfY),
+            size: halfSize,
             parent: q,
+            debug: "2",
         },
         {
-            topleft: rl.Vector2{X: halfX, Y: halfY},
-            bottomright: q.bottomright,
+            pos: rl.NewVector2(q.pos.X + halfX, q.pos.Y + halfY),
+            size: halfSize,
             parent: q,
+            debug: "3",
         },
     }
+    fmt.Println(q.debug)
+    fmt.Println("halfX", halfX, "halfY", halfY)
+    for i, node := range q.nodes {
+        fmt.Println(i, node.pos, node.size)
+    }
+    // fmt.Println(q.nodes)
 }
 
 func (q *quadnode) drawBoundaries() {
@@ -65,14 +72,15 @@ func (q *quadnode) drawBoundaries() {
         return
     }
     for _, node := range q.nodes {
-        node.drawBoundaries()
-        size := rl.Vector2Subtract(node.bottomright, node.topleft)
         rl.DrawRectangleLines(
-            int32(node.topleft.X), int32(node.topleft.Y), 
-            int32(size.X), int32(size.Y),
+            int32(node.pos.X), int32(node.pos.Y), 
+            int32(node.size.X), int32(node.size.Y),
             rl.Green,
         )
     }
+    for _, node := range q.nodes {
+        node.drawBoundaries()
+    }
 }
 
 type magnet struct {
@@ -83,14 +91,6 @@ type magnet struct {
     radius float32
 }
 
-// type ball struct {
-//     pos rl.Vector2
-//     originGrid rl.Vector2
-//     radius float32
-//     speed rl.Vector2
-//     steps int
-// }
-
 // parâmetros
 const initalMagnetCount = 10
 const windowWidth = 700
@@ -197,6 +197,10 @@ func main() {
     quadtree := newQuadTree()
     quadtree.subdivide()
     quadtree.nodes[0].subdivide()
+    quadtree.nodes[1].subdivide()
+    quadtree.nodes[2].subdivide()
+    quadtree.nodes[3].subdivide()
+    quadtree.nodes[2].nodes[0].subdivide()
 
     pause := true