jetpack compose - Draw rounded rectangle on canvas

MainActivity.kt

package com.cfsuman.jetpackcompose

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.compose.foundation.Canvas
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.*
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.CornerRadius
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.*
import androidx.compose.ui.graphics.drawscope.Stroke
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            MainContent()
        }
    }


    @Composable
    fun MainContent(){
        Canvas(
            modifier = Modifier
                .fillMaxSize()
                .background(Color(0xFFEDEAE0))
        )
        {
            drawRoundRect(
                color = Color(0xFF88540B),
                size = Size(
                    width = 300.dp.toPx(),
                    height = 150.dp.toPx()
                ),
                topLeft = Offset(
                    x = 60.dp.toPx(),
                    y = 60.dp.toPx()
                ),
                cornerRadius = CornerRadius(
                    x = 20.dp.toPx(),
                    y = 20.dp.toPx()
                )
            )

            drawRoundRect(
                color = Color(0xFFD3212D),
                size = Size(
                    width = 300.dp.toPx(),
                    height = 125.dp.toPx()
                ),
                topLeft = Offset(
                    x = 60.dp.toPx(),
                    y = 300.dp.toPx()
                ),
                style = Stroke(width = 8.dp.toPx()),
                cornerRadius = CornerRadius(
                    x = 20.dp.toPx(),
                    y = 20.dp.toPx()
                )
            )
        }
    }


    @Preview
    @Composable
    fun ComposablePreview(){
        //MainContent()
    }
}