i think i see 5 & 7
SPOILER: (click box to reveal/hide)

got green, yellow, blue ball, pick and have used pliers

Red And Yellow Balls, I Used Red And Yellow Keys, Pliers And Crowbar,

The Blue Key, And The Blue Ball, Used All My 3 Balls, In The Device Near The Door, It's Now Showing Color Squares

Associate The Numbers In The Book On The floor With The picture On The Wall In the bedroom

Check under safe where you had to insert keys.

5890

1. Go right. Click in the middle under the bed to get pliers.
2. Click side of cabinet to get red key. Take note of the positions of the colors (red, green, yellow, blue)
3. Go right again. Click left side of sliding door cabinet to get eraser.
4. Click under locked cabinet. Use pliers to get green ball.
5. Take chocolate off top of cabinet and unlock red cabinet to get crowbar and chocolate. Go right again.
6. Take chocolate off table. Use crowbar to open cabinet to get red ball. Click left side of shelves to get blue key. Solve table puzzle to get yellow key.
7. Unlock yellow cabinet to get shears and chocolate. Unlock blue cabinet to get blue ball and chocolate.
8. In screen with the door, use shears to get yellow ball and use eraser on the black scribbles in the notebook on the floor. Note where the numbers are. This corresponds with the painting thing on the wall. This is the order the ball should be placed in the screen next to the door. Red first, green, blue and finally yellow.

Now, the number are sort of difficult to see because it's using different hues of that color. But you should be able to figure out yellow is 0 remove that to see blue is 9, remove that and green is eight, remove that and red is five and also the hardest one of them to see. Now put these number into the code on the door in the same order you put the balls in. You should end up with 5890, and it's the same every time.