Concept
![the shadow we made](/images/pcom/post6/hand.png)
Human's firm and gentle can be told with clenched fists and open inclusinve plam. In this way, the ridge of the hand can be fluctuated hardly or smoothly. These can shape a mountain of human character.
Human can be firm and gentle, so do a mountain to be hard and soft. I want to metaphor a human being as a mountain.
![the shadow we made](/images/pcom/post6/concept1.png)
![the shadow we made](/images/pcom/post6/concept0.png)
When an ordinary person like Lulu is here at the installation, she saw a flat surface. When she put her fist firm into the mountain surface, then she would see the mountain arise.
#### Techinical Concern In order to move the montain to arise, I need to find a motor that will be powerful enough and easy to control.
I plan to use linear actuator.
I notice there are multiple kinds of linear actuator. Some of them are simple motor style and some of them is stepper motor style.
![linear actuator](/images/pcom/post6/tech.png)