export default class Ecran1_Tactile extends React.Component {

//setting state

  constructor(props) {
    super(props)

    this.state = {
      opacity: 0,
      click: 0,
    }
  }

//My navigation after 4 clicks

  _displayScreen = () => {
    if(this.state.click === 4){
      this.props.navigation.navigate('Ecran2_Tactile')
    }
  }

//trying to reset state

  componentWillUnmount(){
    this.setState({click: 0})
  }