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import QtQuick 2.0

Rectangle {
    width: 800
    height: 400

    property Gradient simpleGradient: Gradient { GradientStop { position: 0.1; color: "orange" } }
    property Gradient complexGradient: Gradient {
        GradientStop { position: 0.0; color: "red" }
        GradientStop { position: 0.1; color: "orange" }
        GradientStop { position: 0.3; color: "yellow" }
        GradientStop { position: 0.5; color: "green" }
        GradientStop { position: 0.7; color: "cyan" }
        GradientStop { position: 0.9; color: "blue" }
        GradientStop { position: 1.0; color: "magenta" }
    }

    Rectangle {
        clip: true
        x: 20; y: 20
        width: parent.width / 4 - 40; height: width
        color: "red"
        opacity: 0.5
        radius: 40
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
    Rectangle {
        clip: true
        x: parent.width * 0.25 + 20; y: 20
        width: parent.width / 4 - 40; height: width
        color: "blue"
        opacity: 0.5
        radius: 40
        border.color: "cyan"
        border.width: 25
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
    Rectangle {
        clip: true
        x: parent.width * 0.5 + 20; y: 20
        width: parent.width / 4 - 40; height: width
        color: "red"
        opacity: 0.5
        radius: 40
        gradient: simpleGradient
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
    Rectangle {
        clip: true
        x: parent.width * 0.75 + 20; y: 20
        width: parent.width / 4 - 40; height: width
        color: "red"
        opacity: 0.5
        radius: 40
        border.color: "black"
        border.width: 25
        gradient: complexGradient
        SequentialAnimation on border.width {
            loops: Animation.Infinite
            NumberAnimation { to: 0; easing.type: Easing.Linear; duration: 1000 }
            PauseAnimation { duration: 1000 }
            NumberAnimation { to: 25; easing.type: Easing.Linear; duration: 1000 }
            PauseAnimation { duration: 1000 }
        }
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
    
    
    Rectangle {
        clip: true
        x: 20; y: parent.height / 2 + 20
        width: parent.width / 4 - 40; height: width
        color: "red"
        opacity: 0.5
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
    Rectangle {
        clip: true
        x: parent.width * 0.25 + 20; y: parent.height / 2 + 20
        width: parent.width / 4 - 40; height: width
        color: "blue"
        opacity: 0.5
        border.color: "cyan"
        border.width: 25
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
    Rectangle {
        clip: true
        x: parent.width * 0.5 + 20; y: parent.height / 2 + 20
        width: parent.width / 4 - 40; height: width
        color: "red"
        opacity: 0.5
        gradient: simpleGradient
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
    Rectangle {
        clip: true
        x: parent.width * 0.75 + 20; y: parent.height / 2 + 20
        width: parent.width / 4 - 40; height: width
        color: "red"
        opacity: 0.5
        border.color: "black"
        border.width: 25
        gradient: complexGradient
        SequentialAnimation on border.width {
            loops: Animation.Infinite
            NumberAnimation { to: 0; easing.type: Easing.Linear; duration: 1000 }
            PauseAnimation { duration: 1000 }
            NumberAnimation { to: 25; easing.type: Easing.Linear; duration: 1000 }
            PauseAnimation { duration: 1000 }
        }
        Rectangle { x: -20; y: -20; width: 200; height: 200; color: "black" }
    }
}