text: let canvas = document.getElementById("desenho1")
  let ctx=canvas.getContext('2d')
  
  
  function desenha(){
  
  
      //posX, posY, raio, angIni, angFim, sentido
      //sentido : true = horario, false = anti-horario
      //(PI/180) * angulo em grau
      ctx.fillStyle='#000'
      ctx.arc(100,100,100,(Math.PI/180)*0,(Math.PI/180)*90,true)
      ctx.fill()
      ctx.beginPath()
  
      ctx.fillStyle='#f00'
      ctx.arc(100,100,100,(Math.PI/180)*0,(Math.PI/180)*90,false)
      ctx.fill()
  
  }
  
  
  desenha()