Step 4:

1:
/summon armor_stand ~0.125 ~0.34 ~-1.675 {Invisible:1b,NoGravity:1b,ShowArms:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"repeater",Count:1b},{}],Pose:{RightArm:[180f,63f,90f]}}

2:
/summon armor_stand ~0.185 ~0.34 ~-1.675 {Invisible:1b,NoGravity:1b,ShowArms:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"repeater",Count:1b},{}],Pose:{RightArm:[180f,63f,90f]}}

3:
/summon armor_stand ~0.78 ~-0.14 ~-2.35 {Invisible:1b,NoGravity:1b,ShowArms:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

4:
/summon armor_stand ~0.59 ~0.715 ~-2.25 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

5:
/summon armor_stand ~0.59 ~0.715 ~-2.3 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

6:
/summon armor_stand ~0.56 ~0.715 ~-2.35 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

7:
/summon armor_stand ~0.56 ~0.715 ~-2.365 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

8:
/summon armor_stand ~0.62 ~0.715 ~-2.35 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

9:
/summon armor_stand ~0.62 ~0.715 ~-2.365 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

10:
/summon armor_stand ~0.59 ~0.715 ~-2.41 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

11:
/summon armor_stand ~0.59 ~0.715 ~-2.425 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

12:
/summon armor_stand ~0.59 ~0.715 ~-2.475 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

13:
/summon armor_stand ~0.59 ~0.715 ~-2.490 {Invisible:1b,NoGravity:1b,ShowArms:1b,Small:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"lever",Count:1b},{}],Pose:{RightArm:[270f,0f,0f]}}

14:
/summon armor_stand ~0.73 ~0.75 ~-2.595 {Invisible:1b,NoGravity:1b,Small:1b,ShowArms:1b,ArmorItems:[{},{},{},{}],HandItems:[{id:"stone_button",Count:1b},{}],Pose:{RightArm:[255f,0f,315f]}}