# Set up the PDF output file with A4 paper size
pdf("output.pdf", paper = "a4", width = 8.27, height = 11.69)

# Write some text with headings
cat("Introduction\n")
cat("This is a sample document created with R to demonstrate how to write paragraphs with headings.\n\n")

cat("Section 1: Background\n")
cat("In this section, we provide some background information on the topic of this document.\n\n")

cat("Section 2: Methods\n")
cat("In this section, we describe the methods used to conduct the research presented in this document.\n\n")

cat("Section 3: Results\n")
cat("In this section, we present the results of the research and describe their implications.\n\n")

cat("Conclusion\n")
cat("In conclusion, this document provides a brief overview of the research conducted on this topic.\n\n")

# Close the PDF file
dev.off()