and this is my simulation code ```from amaranth.sim import Simulator
import buttontoled

dut = buttontoled()
async def testbench(ctx):
    await ctx.delay(1e-6)
    ctx.set(dut.button, 1)
    await ctx.delay(1e-6)
    ctx.set(dut.button, 0)
    await ctx.delay(1e-6)

sim = Simulator(dut)
sim.add_testbench(testbench)
with sim.write_vcd("buttontoled.vcd"):
    sim.run()```