bs_end.xml

<ConstraintSet
        android:id="@+id/end"
        motion:deriveConstraintsFrom="@id/start">

        <Constraint
            android:id="@+id/card"
            android:layout_width="0dp"
            android:layout_height="100dp"
            android:layout_marginStart="0dp"
            android:layout_marginEnd="0dp"
            android:layout_marginBottom="0dp"
            motion:layout_constraintBottom_toBottomOf="parent"
            motion:layout_constraintEnd_toEndOf="parent"
            motion:layout_constraintStart_toStartOf="parent">
            <CustomAttribute
                motion:attributeName="radius"
                motion:customDimension="8dp" />
            <CustomAttribute
                motion:attributeName="cardBackgroundColor"
                motion:customColorValue="#ffffff" />
        </Constraint>

    </ConstraintSet>